Home / 12,489.23-18,733.40-3,129.32

Finding the Fourth Proportional to 12,489.23, 18,733.40 and 3,129.32

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Solution

The fourth proportional to 12,489.23, 18,733.40 and 3,129.32 is: 4,693.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.23 : 18,733.40 = 3,129.32 : x
  2. Step 2: Convert to fraction form
    12,489.23/18,733.40 = 3,129.32/x
  3. Step 3: Cross multiply
    12,489.23x = 18,733.40 × 3,129.32
  4. Step 4: Simplify right side
    12,489.23x = 58,622,787.64
  5. Step 5: Solve for x
    x = 58,622,787.64/12,489.23
  6. Step 6: Final answer
    x = 4,693.87

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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.