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Finding the Fourth Proportional to 13,708.59, 18,916.71 and 8,042.74

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Solution

The fourth proportional to 13,708.59, 18,916.71 and 8,042.74 is: 11,098.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.59 : 18,916.71 = 8,042.74 : x
  2. Step 2: Convert to fraction form
    13,708.59/18,916.71 = 8,042.74/x
  3. Step 3: Cross multiply
    13,708.59x = 18,916.71 × 8,042.74
  4. Step 4: Simplify right side
    13,708.59x = 152,142,209.14
  5. Step 5: Solve for x
    x = 152,142,209.14/13,708.59
  6. Step 6: Final answer
    x = 11,098.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.