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Finding the Fourth Proportional to 7,061.67, 9,789.75 and 6,687.18

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Solution

The fourth proportional to 7,061.67, 9,789.75 and 6,687.18 is: 9,270.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,061.67 : 9,789.75 = 6,687.18 : x
  2. Step 2: Convert to fraction form
    7,061.67/9,789.75 = 6,687.18/x
  3. Step 3: Cross multiply
    7,061.67x = 9,789.75 × 6,687.18
  4. Step 4: Simplify right side
    7,061.67x = 65,465,820.41
  5. Step 5: Solve for x
    x = 65,465,820.41/7,061.67
  6. Step 6: Final answer
    x = 9,270.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.