Home / 15,642.87-21,587.03-8,472.61

Finding the Fourth Proportional to 15,642.87, 21,587.03 and 8,472.61

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Solution

The fourth proportional to 15,642.87, 21,587.03 and 8,472.61 is: 11,692.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,642.87 : 21,587.03 = 8,472.61 : x
  2. Step 2: Convert to fraction form
    15,642.87/21,587.03 = 8,472.61/x
  3. Step 3: Cross multiply
    15,642.87x = 21,587.03 × 8,472.61
  4. Step 4: Simplify right side
    15,642.87x = 182,898,503.21
  5. Step 5: Solve for x
    x = 182,898,503.21/15,642.87
  6. Step 6: Final answer
    x = 11,692.14

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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.