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Finding the Fourth Proportional to 7,929.80, 10,909.59 and 7,711.10

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Solution

The fourth proportional to 7,929.80, 10,909.59 and 7,711.10 is: 10,608.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,929.80 : 10,909.59 = 7,711.10 : x
  2. Step 2: Convert to fraction form
    7,929.80/10,909.59 = 7,711.10/x
  3. Step 3: Cross multiply
    7,929.80x = 10,909.59 × 7,711.10
  4. Step 4: Simplify right side
    7,929.80x = 84,124,939.45
  5. Step 5: Solve for x
    x = 84,124,939.45/7,929.80
  6. Step 6: Final answer
    x = 10,608.71

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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.