Home / 15,439.56-21,287.13-12,604.05

Finding the Fourth Proportional to 15,439.56, 21,287.13 and 12,604.05

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Solution

The fourth proportional to 15,439.56, 21,287.13 and 12,604.05 is: 17,377.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,439.56 : 21,287.13 = 12,604.05 : x
  2. Step 2: Convert to fraction form
    15,439.56/21,287.13 = 12,604.05/x
  3. Step 3: Cross multiply
    15,439.56x = 21,287.13 × 12,604.05
  4. Step 4: Simplify right side
    15,439.56x = 268,304,050.88
  5. Step 5: Solve for x
    x = 268,304,050.88/15,439.56
  6. Step 6: Final answer
    x = 17,377.70

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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.