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Finding the Fourth Proportional to 19,861.60, 29,727.60 and 15,930.40

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Solution

The fourth proportional to 19,861.60, 29,727.60 and 15,930.40 is: 23,843.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,861.60 : 29,727.60 = 15,930.40 : x
  2. Step 2: Convert to fraction form
    19,861.60/29,727.60 = 15,930.40/x
  3. Step 3: Cross multiply
    19,861.60x = 29,727.60 × 15,930.40
  4. Step 4: Simplify right side
    19,861.60x = 473,572,559.04
  5. Step 5: Solve for x
    x = 473,572,559.04/19,861.60
  6. Step 6: Final answer
    x = 23,843.63

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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.