Home / 8,387.78-12,587.45-3,457.42

Finding the Fourth Proportional to 8,387.78, 12,587.45 and 3,457.42

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Solution

The fourth proportional to 8,387.78, 12,587.45 and 3,457.42 is: 5,188.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,387.78 : 12,587.45 = 3,457.42 : x
  2. Step 2: Convert to fraction form
    8,387.78/12,587.45 = 3,457.42/x
  3. Step 3: Cross multiply
    8,387.78x = 12,587.45 × 3,457.42
  4. Step 4: Simplify right side
    8,387.78x = 43,520,052.62
  5. Step 5: Solve for x
    x = 43,520,052.62/8,387.78
  6. Step 6: Final answer
    x = 5,188.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.