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Finding the Fourth Proportional to 12,489.48, 18,733 and 3,723.64

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Solution

The fourth proportional to 12,489.48, 18,733 and 3,723.64 is: 5,585.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.48 : 18,733 = 3,723.64 : x
  2. Step 2: Convert to fraction form
    12,489.48/18,733 = 3,723.64/x
  3. Step 3: Cross multiply
    12,489.48x = 18,733 × 3,723.64
  4. Step 4: Simplify right side
    12,489.48x = 69,754,948.12
  5. Step 5: Solve for x
    x = 69,754,948.12/12,489.48
  6. Step 6: Final answer
    x = 5,585.10

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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.