Home / 15,304.32-21,121.20-8,589.78

Finding the Fourth Proportional to 15,304.32, 21,121.20 and 8,589.78

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Solution

The fourth proportional to 15,304.32, 21,121.20 and 8,589.78 is: 11,854.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,304.32 : 21,121.20 = 8,589.78 : x
  2. Step 2: Convert to fraction form
    15,304.32/21,121.20 = 8,589.78/x
  3. Step 3: Cross multiply
    15,304.32x = 21,121.20 × 8,589.78
  4. Step 4: Simplify right side
    15,304.32x = 181,426,461.34
  5. Step 5: Solve for x
    x = 181,426,461.34/15,304.32
  6. Step 6: Final answer
    x = 11,854.59

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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.