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Finding the Fourth Proportional to 42,869.80, 64,294.62 and 11,697.64

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Solution

The fourth proportional to 42,869.80, 64,294.62 and 11,697.64 is: 17,543.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,869.80 : 64,294.62 = 11,697.64 : x
  2. Step 2: Convert to fraction form
    42,869.80/64,294.62 = 11,697.64/x
  3. Step 3: Cross multiply
    42,869.80x = 64,294.62 × 11,697.64
  4. Step 4: Simplify right side
    42,869.80x = 752,095,318.70
  5. Step 5: Solve for x
    x = 752,095,318.70/42,869.80
  6. Step 6: Final answer
    x = 17,543.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.