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Finding the Fourth Proportional to 8,125.59, 11,209.66 and 7,127.80

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Solution

The fourth proportional to 8,125.59, 11,209.66 and 7,127.80 is: 9,833.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,125.59 : 11,209.66 = 7,127.80 : x
  2. Step 2: Convert to fraction form
    8,125.59/11,209.66 = 7,127.80/x
  3. Step 3: Cross multiply
    8,125.59x = 11,209.66 × 7,127.80
  4. Step 4: Simplify right side
    8,125.59x = 79,900,214.55
  5. Step 5: Solve for x
    x = 79,900,214.55/8,125.59
  6. Step 6: Final answer
    x = 9,833.16

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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.