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Finding the Fourth Proportional to 9,104.60, 13,689.30 and 8,910.20

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Solution

The fourth proportional to 9,104.60, 13,689.30 and 8,910.20 is: 13,397.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,104.60 : 13,689.30 = 8,910.20 : x
  2. Step 2: Convert to fraction form
    9,104.60/13,689.30 = 8,910.20/x
  3. Step 3: Cross multiply
    9,104.60x = 13,689.30 × 8,910.20
  4. Step 4: Simplify right side
    9,104.60x = 121,974,400.86
  5. Step 5: Solve for x
    x = 121,974,400.86/9,104.60
  6. Step 6: Final answer
    x = 13,397.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.