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Finding the Fourth Proportional to 10,959.20, 16,425.30 and 7,449.20

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Solution

The fourth proportional to 10,959.20, 16,425.30 and 7,449.20 is: 11,164.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,959.20 : 16,425.30 = 7,449.20 : x
  2. Step 2: Convert to fraction form
    10,959.20/16,425.30 = 7,449.20/x
  3. Step 3: Cross multiply
    10,959.20x = 16,425.30 × 7,449.20
  4. Step 4: Simplify right side
    10,959.20x = 122,355,344.76
  5. Step 5: Solve for x
    x = 122,355,344.76/10,959.20
  6. Step 6: Final answer
    x = 11,164.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.