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Finding the Fourth Proportional to 10,905.22, 15,049.05 and 6,429.16

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Solution

The fourth proportional to 10,905.22, 15,049.05 and 6,429.16 is: 8,872.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,905.22 : 15,049.05 = 6,429.16 : x
  2. Step 2: Convert to fraction form
    10,905.22/15,049.05 = 6,429.16/x
  3. Step 3: Cross multiply
    10,905.22x = 15,049.05 × 6,429.16
  4. Step 4: Simplify right side
    10,905.22x = 96,752,750.30
  5. Step 5: Solve for x
    x = 96,752,750.30/10,905.22
  6. Step 6: Final answer
    x = 8,872.15

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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.