Home / 12,454.28-18,685.03-3,689.40

Finding the Fourth Proportional to 12,454.28, 18,685.03 and 3,689.40

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Solution

The fourth proportional to 12,454.28, 18,685.03 and 3,689.40 is: 5,535.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,454.28 : 18,685.03 = 3,689.40 : x
  2. Step 2: Convert to fraction form
    12,454.28/18,685.03 = 3,689.40/x
  3. Step 3: Cross multiply
    12,454.28x = 18,685.03 × 3,689.40
  4. Step 4: Simplify right side
    12,454.28x = 68,936,549.68
  5. Step 5: Solve for x
    x = 68,936,549.68/12,454.28
  6. Step 6: Final answer
    x = 5,535.17

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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.