Home / 15,439.17-21,304.35-8,724.78

Finding the Fourth Proportional to 15,439.17, 21,304.35 and 8,724.78

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Solution

The fourth proportional to 15,439.17, 21,304.35 and 8,724.78 is: 12,039.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,439.17 : 21,304.35 = 8,724.78 : x
  2. Step 2: Convert to fraction form
    15,439.17/21,304.35 = 8,724.78/x
  3. Step 3: Cross multiply
    15,439.17x = 21,304.35 × 8,724.78
  4. Step 4: Simplify right side
    15,439.17x = 185,875,850.79
  5. Step 5: Solve for x
    x = 185,875,850.79/15,439.17
  6. Step 6: Final answer
    x = 12,039.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.