Home / 15,434.97-21,299.22-8,720.88

Finding the Fourth Proportional to 15,434.97, 21,299.22 and 8,720.88

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Solution

The fourth proportional to 15,434.97, 21,299.22 and 8,720.88 is: 12,034.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,434.97 : 21,299.22 = 8,720.88 : x
  2. Step 2: Convert to fraction form
    15,434.97/21,299.22 = 8,720.88/x
  3. Step 3: Cross multiply
    15,434.97x = 21,299.22 × 8,720.88
  4. Step 4: Simplify right side
    15,434.97x = 185,747,941.71
  5. Step 5: Solve for x
    x = 185,747,941.71/15,434.97
  6. Step 6: Final answer
    x = 12,034.23

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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.