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Finding the Fourth Proportional to 7,179.80, 9,905.32 and 5,295.87

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Solution

The fourth proportional to 7,179.80, 9,905.32 and 5,295.87 is: 7,306.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,179.80 : 9,905.32 = 5,295.87 : x
  2. Step 2: Convert to fraction form
    7,179.80/9,905.32 = 5,295.87/x
  3. Step 3: Cross multiply
    7,179.80x = 9,905.32 × 5,295.87
  4. Step 4: Simplify right side
    7,179.80x = 52,457,273.79
  5. Step 5: Solve for x
    x = 52,457,273.79/7,179.80
  6. Step 6: Final answer
    x = 7,306.23

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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.