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Finding the Fourth Proportional to 18,221.76, 27,332.74 and 5,074.15

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Solution

The fourth proportional to 18,221.76, 27,332.74 and 5,074.15 is: 7,611.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,221.76 : 27,332.74 = 5,074.15 : x
  2. Step 2: Convert to fraction form
    18,221.76/27,332.74 = 5,074.15/x
  3. Step 3: Cross multiply
    18,221.76x = 27,332.74 × 5,074.15
  4. Step 4: Simplify right side
    18,221.76x = 138,690,422.67
  5. Step 5: Solve for x
    x = 138,690,422.67/18,221.76
  6. Step 6: Final answer
    x = 7,611.25

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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.