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Finding the Fourth Proportional to 20,595.71, 28,425.11 and 13,042.73

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Solution

The fourth proportional to 20,595.71, 28,425.11 and 13,042.73 is: 18,000.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,595.71 : 28,425.11 = 13,042.73 : x
  2. Step 2: Convert to fraction form
    20,595.71/28,425.11 = 13,042.73/x
  3. Step 3: Cross multiply
    20,595.71x = 28,425.11 × 13,042.73
  4. Step 4: Simplify right side
    20,595.71x = 370,741,034.95
  5. Step 5: Solve for x
    x = 370,741,034.95/20,595.71
  6. Step 6: Final answer
    x = 18,000.89

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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.