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Finding the Fourth Proportional to 21,911.60, 32,867.40 and 13,041.20

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Solution

The fourth proportional to 21,911.60, 32,867.40 and 13,041.20 is: 19,561.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,911.60 : 32,867.40 = 13,041.20 : x
  2. Step 2: Convert to fraction form
    21,911.60/32,867.40 = 13,041.20/x
  3. Step 3: Cross multiply
    21,911.60x = 32,867.40 × 13,041.20
  4. Step 4: Simplify right side
    21,911.60x = 428,630,336.88
  5. Step 5: Solve for x
    x = 428,630,336.88/21,911.60
  6. Step 6: Final answer
    x = 19,561.80

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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.