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Finding the Fourth Proportional to 10,920.15, 16,375.05 and 4,995.29

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Solution

The fourth proportional to 10,920.15, 16,375.05 and 4,995.29 is: 7,490.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.15 : 16,375.05 = 4,995.29 : x
  2. Step 2: Convert to fraction form
    10,920.15/16,375.05 = 4,995.29/x
  3. Step 3: Cross multiply
    10,920.15x = 16,375.05 × 4,995.29
  4. Step 4: Simplify right side
    10,920.15x = 81,798,164.45
  5. Step 5: Solve for x
    x = 81,798,164.45/10,920.15
  6. Step 6: Final answer
    x = 7,490.57

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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.