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Finding the Fourth Proportional to 19,640.16, 29,468.88 and 10,404

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Solution

The fourth proportional to 19,640.16, 29,468.88 and 10,404 is: 15,610.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,640.16 : 29,468.88 = 10,404 : x
  2. Step 2: Convert to fraction form
    19,640.16/29,468.88 = 10,404/x
  3. Step 3: Cross multiply
    19,640.16x = 29,468.88 × 10,404
  4. Step 4: Simplify right side
    19,640.16x = 306,594,227.52
  5. Step 5: Solve for x
    x = 306,594,227.52/19,640.16
  6. Step 6: Final answer
    x = 15,610.58

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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.