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Finding the Fourth Proportional to 19,540.40, 29,267.40 and 15,123.20

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Solution

The fourth proportional to 19,540.40, 29,267.40 and 15,123.20 is: 22,651.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,540.40 : 29,267.40 = 15,123.20 : x
  2. Step 2: Convert to fraction form
    19,540.40/29,267.40 = 15,123.20/x
  3. Step 3: Cross multiply
    19,540.40x = 29,267.40 × 15,123.20
  4. Step 4: Simplify right side
    19,540.40x = 442,616,743.68
  5. Step 5: Solve for x
    x = 442,616,743.68/19,540.40
  6. Step 6: Final answer
    x = 22,651.37

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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.