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Finding the Fourth Proportional to 19,677.80, 29,516.70 and 15,789.80

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Solution

The fourth proportional to 19,677.80, 29,516.70 and 15,789.80 is: 23,684.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,677.80 : 29,516.70 = 15,789.80 : x
  2. Step 2: Convert to fraction form
    19,677.80/29,516.70 = 15,789.80/x
  3. Step 3: Cross multiply
    19,677.80x = 29,516.70 × 15,789.80
  4. Step 4: Simplify right side
    19,677.80x = 466,062,789.66
  5. Step 5: Solve for x
    x = 466,062,789.66/19,677.80
  6. Step 6: Final answer
    x = 23,684.70

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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.