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Finding the Fourth Proportional to 8,425.58, 12,538.87 and 8,145.28

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Solution

The fourth proportional to 8,425.58, 12,538.87 and 8,145.28 is: 12,121.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,425.58 : 12,538.87 = 8,145.28 : x
  2. Step 2: Convert to fraction form
    8,425.58/12,538.87 = 8,145.28/x
  3. Step 3: Cross multiply
    8,425.58x = 12,538.87 × 8,145.28
  4. Step 4: Simplify right side
    8,425.58x = 102,132,607.03
  5. Step 5: Solve for x
    x = 102,132,607.03/8,425.58
  6. Step 6: Final answer
    x = 12,121.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.