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Finding the Fourth Proportional to 8,642.38, 11,901.36 and 7,507.53

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Solution

The fourth proportional to 8,642.38, 11,901.36 and 7,507.53 is: 10,338.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,642.38 : 11,901.36 = 7,507.53 : x
  2. Step 2: Convert to fraction form
    8,642.38/11,901.36 = 7,507.53/x
  3. Step 3: Cross multiply
    8,642.38x = 11,901.36 × 7,507.53
  4. Step 4: Simplify right side
    8,642.38x = 89,349,757.73
  5. Step 5: Solve for x
    x = 89,349,757.73/8,642.38
  6. Step 6: Final answer
    x = 10,338.57

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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.