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Finding the Fourth Proportional to 19,957.20, 29,910.60 and 10,099.20

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Solution

The fourth proportional to 19,957.20, 29,910.60 and 10,099.20 is: 15,136.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,957.20 : 29,910.60 = 10,099.20 : x
  2. Step 2: Convert to fraction form
    19,957.20/29,910.60 = 10,099.20/x
  3. Step 3: Cross multiply
    19,957.20x = 29,910.60 × 10,099.20
  4. Step 4: Simplify right side
    19,957.20x = 302,073,131.52
  5. Step 5: Solve for x
    x = 302,073,131.52/19,957.20
  6. Step 6: Final answer
    x = 15,136.05

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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.