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Finding the Fourth Proportional to 7,909.16, 10,908.42 and 7,379.24

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Solution

The fourth proportional to 7,909.16, 10,908.42 and 7,379.24 is: 10,177.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,909.16 : 10,908.42 = 7,379.24 : x
  2. Step 2: Convert to fraction form
    7,909.16/10,908.42 = 7,379.24/x
  3. Step 3: Cross multiply
    7,909.16x = 10,908.42 × 7,379.24
  4. Step 4: Simplify right side
    7,909.16x = 80,495,849.20
  5. Step 5: Solve for x
    x = 80,495,849.20/7,909.16
  6. Step 6: Final answer
    x = 10,177.55

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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.