Home / 15,321.28-21,144.64-9,034.88

Finding the Fourth Proportional to 15,321.28, 21,144.64 and 9,034.88

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Solution

The fourth proportional to 15,321.28, 21,144.64 and 9,034.88 is: 12,468.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.28 : 21,144.64 = 9,034.88 : x
  2. Step 2: Convert to fraction form
    15,321.28/21,144.64 = 9,034.88/x
  3. Step 3: Cross multiply
    15,321.28x = 21,144.64 × 9,034.88
  4. Step 4: Simplify right side
    15,321.28x = 191,039,285.04
  5. Step 5: Solve for x
    x = 191,039,285.04/15,321.28
  6. Step 6: Final answer
    x = 12,468.89

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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.