Home / 12,457.28-18,685.87-3,691.49

Finding the Fourth Proportional to 12,457.28, 18,685.87 and 3,691.49

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Solution

The fourth proportional to 12,457.28, 18,685.87 and 3,691.49 is: 5,537.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457.28 : 18,685.87 = 3,691.49 : x
  2. Step 2: Convert to fraction form
    12,457.28/18,685.87 = 3,691.49/x
  3. Step 3: Cross multiply
    12,457.28x = 18,685.87 × 3,691.49
  4. Step 4: Simplify right side
    12,457.28x = 68,978,702.25
  5. Step 5: Solve for x
    x = 68,978,702.25/12,457.28
  6. Step 6: Final answer
    x = 5,537.22

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1.5x scale

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.