Home / 28,208.20-42,312.30-7,148.20

Finding the Fourth Proportional to 28,208.20, 42,312.30 and 7,148.20

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Solution

The fourth proportional to 28,208.20, 42,312.30 and 7,148.20 is: 10,722.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,208.20 : 42,312.30 = 7,148.20 : x
  2. Step 2: Convert to fraction form
    28,208.20/42,312.30 = 7,148.20/x
  3. Step 3: Cross multiply
    28,208.20x = 42,312.30 × 7,148.20
  4. Step 4: Simplify right side
    28,208.20x = 302,456,782.86
  5. Step 5: Solve for x
    x = 302,456,782.86/28,208.20
  6. Step 6: Final answer
    x = 10,722.30

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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.