Home / 15,930.60-21,984.12-8,857.20

Finding the Fourth Proportional to 15,930.60, 21,984.12 and 8,857.20

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Solution

The fourth proportional to 15,930.60, 21,984.12 and 8,857.20 is: 12,222.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,930.60 : 21,984.12 = 8,857.20 : x
  2. Step 2: Convert to fraction form
    15,930.60/21,984.12 = 8,857.20/x
  3. Step 3: Cross multiply
    15,930.60x = 21,984.12 × 8,857.20
  4. Step 4: Simplify right side
    15,930.60x = 194,717,747.66
  5. Step 5: Solve for x
    x = 194,717,747.66/15,930.60
  6. Step 6: Final answer
    x = 12,222.88

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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.