Home / 8,686.28-11,988.60-5,151.44

Finding the Fourth Proportional to 8,686.28, 11,988.60 and 5,151.44

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Solution

The fourth proportional to 8,686.28, 11,988.60 and 5,151.44 is: 7,109.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.28 : 11,988.60 = 5,151.44 : x
  2. Step 2: Convert to fraction form
    8,686.28/11,988.60 = 5,151.44/x
  3. Step 3: Cross multiply
    8,686.28x = 11,988.60 × 5,151.44
  4. Step 4: Simplify right side
    8,686.28x = 61,758,553.58
  5. Step 5: Solve for x
    x = 61,758,553.58/8,686.28
  6. Step 6: Final answer
    x = 7,109.90

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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.