Home / 21,260,208.20-31,890,312.30-20,420,400.20

Finding the Fourth Proportional to 21,260,208.20, 31,890,312.30 and 20,420,400.20

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Solution

The fourth proportional to 21,260,208.20, 31,890,312.30 and 20,420,400.20 is: 30,630,600.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,260,208.20 : 31,890,312.30 = 20,420,400.20 : x
  2. Step 2: Convert to fraction form
    21,260,208.20/31,890,312.30 = 20,420,400.20/x
  3. Step 3: Cross multiply
    21,260,208.20x = 31,890,312.30 × 20,420,400.20
  4. Step 4: Simplify right side
    21,260,208.20x = 651,212,939,668,982.50
  5. Step 5: Solve for x
    x = 651,212,939,668,982.50/21,260,208.20
  6. Step 6: Final answer
    x = 30,630,600.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.