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Finding the Fourth Proportional to 18,727.71, 28,086.70 and 7,482.58

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Solution

The fourth proportional to 18,727.71, 28,086.70 and 7,482.58 is: 11,221.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,727.71 : 28,086.70 = 7,482.58 : x
  2. Step 2: Convert to fraction form
    18,727.71/28,086.70 = 7,482.58/x
  3. Step 3: Cross multiply
    18,727.71x = 28,086.70 × 7,482.58
  4. Step 4: Simplify right side
    18,727.71x = 210,160,904.79
  5. Step 5: Solve for x
    x = 210,160,904.79/18,727.71
  6. Step 6: Final answer
    x = 11,221.92

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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.