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Finding the Fourth Proportional to 9,368.70, 12,882.15 and 8,979.90

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Solution

The fourth proportional to 9,368.70, 12,882.15 and 8,979.90 is: 12,347.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,368.70 : 12,882.15 = 8,979.90 : x
  2. Step 2: Convert to fraction form
    9,368.70/12,882.15 = 8,979.90/x
  3. Step 3: Cross multiply
    9,368.70x = 12,882.15 × 8,979.90
  4. Step 4: Simplify right side
    9,368.70x = 115,680,418.79
  5. Step 5: Solve for x
    x = 115,680,418.79/9,368.70
  6. Step 6: Final answer
    x = 12,347.54

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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.