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Finding the Fourth Proportional to 11,150.40, 16,701.30 and 9,919.20

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Solution

The fourth proportional to 11,150.40, 16,701.30 and 9,919.20 is: 14,857.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,150.40 : 16,701.30 = 9,919.20 : x
  2. Step 2: Convert to fraction form
    11,150.40/16,701.30 = 9,919.20/x
  3. Step 3: Cross multiply
    11,150.40x = 16,701.30 × 9,919.20
  4. Step 4: Simplify right side
    11,150.40x = 165,663,534.96
  5. Step 5: Solve for x
    x = 165,663,534.96/11,150.40
  6. Step 6: Final answer
    x = 14,857.18

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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.