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Finding the Fourth Proportional to 7,151.68, 9,869.61 and 4,008.07

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Solution

The fourth proportional to 7,151.68, 9,869.61 and 4,008.07 is: 5,531.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,151.68 : 9,869.61 = 4,008.07 : x
  2. Step 2: Convert to fraction form
    7,151.68/9,869.61 = 4,008.07/x
  3. Step 3: Cross multiply
    7,151.68x = 9,869.61 × 4,008.07
  4. Step 4: Simplify right side
    7,151.68x = 39,558,087.75
  5. Step 5: Solve for x
    x = 39,558,087.75/7,151.68
  6. Step 6: Final answer
    x = 5,531.30

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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.