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Finding the Fourth Proportional to 18,992.76, 28,489.16 and 4,952.78

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Solution

The fourth proportional to 18,992.76, 28,489.16 and 4,952.78 is: 7,429.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,992.76 : 28,489.16 = 4,952.78 : x
  2. Step 2: Convert to fraction form
    18,992.76/28,489.16 = 4,952.78/x
  3. Step 3: Cross multiply
    18,992.76x = 28,489.16 × 4,952.78
  4. Step 4: Simplify right side
    18,992.76x = 141,100,411.80
  5. Step 5: Solve for x
    x = 141,100,411.80/18,992.76
  6. Step 6: Final answer
    x = 7,429.17

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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.