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Finding the Fourth Proportional to 9,354.02, 12,921.12 and 8,689.71

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Solution

The fourth proportional to 9,354.02, 12,921.12 and 8,689.71 is: 12,003.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,354.02 : 12,921.12 = 8,689.71 : x
  2. Step 2: Convert to fraction form
    9,354.02/12,921.12 = 8,689.71/x
  3. Step 3: Cross multiply
    9,354.02x = 12,921.12 × 8,689.71
  4. Step 4: Simplify right side
    9,354.02x = 112,280,834.13
  5. Step 5: Solve for x
    x = 112,280,834.13/9,354.02
  6. Step 6: Final answer
    x = 12,003.49

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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.