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Finding the Fourth Proportional to 9,347.27, 12,872.99 and 9,143.15

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Solution

The fourth proportional to 9,347.27, 12,872.99 and 9,143.15 is: 12,591.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,347.27 : 12,872.99 = 9,143.15 : x
  2. Step 2: Convert to fraction form
    9,347.27/12,872.99 = 9,143.15/x
  3. Step 3: Cross multiply
    9,347.27x = 12,872.99 × 9,143.15
  4. Step 4: Simplify right side
    9,347.27x = 117,699,616.71
  5. Step 5: Solve for x
    x = 117,699,616.71/9,347.27
  6. Step 6: Final answer
    x = 12,591.87

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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.