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Finding the Fourth Proportional to 10,920.90, 16,344.90 and 9,608.70

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Solution

The fourth proportional to 10,920.90, 16,344.90 and 9,608.70 is: 14,380.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.90 : 16,344.90 = 9,608.70 : x
  2. Step 2: Convert to fraction form
    10,920.90/16,344.90 = 9,608.70/x
  3. Step 3: Cross multiply
    10,920.90x = 16,344.90 × 9,608.70
  4. Step 4: Simplify right side
    10,920.90x = 157,053,240.63
  5. Step 5: Solve for x
    x = 157,053,240.63/10,920.90
  6. Step 6: Final answer
    x = 14,380.98

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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.