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Finding the Fourth Proportional to 19,613.78, 29,411.42 and 7,124.99

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Solution

The fourth proportional to 19,613.78, 29,411.42 and 7,124.99 is: 10,684.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,613.78 : 29,411.42 = 7,124.99 : x
  2. Step 2: Convert to fraction form
    19,613.78/29,411.42 = 7,124.99/x
  3. Step 3: Cross multiply
    19,613.78x = 29,411.42 × 7,124.99
  4. Step 4: Simplify right side
    19,613.78x = 209,555,890.70
  5. Step 5: Solve for x
    x = 209,555,890.70/19,613.78
  6. Step 6: Final answer
    x = 10,684.12

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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.