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Finding the Fourth Proportional to 6,640.84, 9,154.29 and 5,459.86

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Solution

The fourth proportional to 6,640.84, 9,154.29 and 5,459.86 is: 7,526.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.84 : 9,154.29 = 5,459.86 : x
  2. Step 2: Convert to fraction form
    6,640.84/9,154.29 = 5,459.86/x
  3. Step 3: Cross multiply
    6,640.84x = 9,154.29 × 5,459.86
  4. Step 4: Simplify right side
    6,640.84x = 49,981,141.80
  5. Step 5: Solve for x
    x = 49,981,141.80/6,640.84
  6. Step 6: Final answer
    x = 7,526.33

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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.