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Finding the Fourth Proportional to 7,242.65, 9,991.49 and 5,118.22

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Solution

The fourth proportional to 7,242.65, 9,991.49 and 5,118.22 is: 7,060.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,242.65 : 9,991.49 = 5,118.22 : x
  2. Step 2: Convert to fraction form
    7,242.65/9,991.49 = 5,118.22/x
  3. Step 3: Cross multiply
    7,242.65x = 9,991.49 × 5,118.22
  4. Step 4: Simplify right side
    7,242.65x = 51,138,630.85
  5. Step 5: Solve for x
    x = 51,138,630.85/7,242.65
  6. Step 6: Final answer
    x = 7,060.76

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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.