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Finding the Fourth Proportional to 18,572.84, 27,863.28 and 7,479.88

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Solution

The fourth proportional to 18,572.84, 27,863.28 and 7,479.88 is: 11,221.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,572.84 : 27,863.28 = 7,479.88 : x
  2. Step 2: Convert to fraction form
    18,572.84/27,863.28 = 7,479.88/x
  3. Step 3: Cross multiply
    18,572.84x = 27,863.28 × 7,479.88
  4. Step 4: Simplify right side
    18,572.84x = 208,413,990.81
  5. Step 5: Solve for x
    x = 208,413,990.81/18,572.84
  6. Step 6: Final answer
    x = 11,221.44

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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.