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Finding the Fourth Proportional to 15,087.38, 20,820.94 and 8,463.38

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Solution

The fourth proportional to 15,087.38, 20,820.94 and 8,463.38 is: 11,679.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,087.38 : 20,820.94 = 8,463.38 : x
  2. Step 2: Convert to fraction form
    15,087.38/20,820.94 = 8,463.38/x
  3. Step 3: Cross multiply
    15,087.38x = 20,820.94 × 8,463.38
  4. Step 4: Simplify right side
    15,087.38x = 176,215,401.91
  5. Step 5: Solve for x
    x = 176,215,401.91/15,087.38
  6. Step 6: Final answer
    x = 11,679.66

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Half scale
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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.