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Finding the Fourth Proportional to 7,909.65, 10,913.13 and 5,517.05

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Solution

The fourth proportional to 7,909.65, 10,913.13 and 5,517.05 is: 7,612.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,909.65 : 10,913.13 = 5,517.05 : x
  2. Step 2: Convert to fraction form
    7,909.65/10,913.13 = 5,517.05/x
  3. Step 3: Cross multiply
    7,909.65x = 10,913.13 × 5,517.05
  4. Step 4: Simplify right side
    7,909.65x = 60,208,229.30
  5. Step 5: Solve for x
    x = 60,208,229.30/7,909.65
  6. Step 6: Final answer
    x = 7,612.00

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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.