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Finding the Fourth Proportional to 18,738.29, 28,110.87 and 6,257.13

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Solution

The fourth proportional to 18,738.29, 28,110.87 and 6,257.13 is: 9,386.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,738.29 : 28,110.87 = 6,257.13 : x
  2. Step 2: Convert to fraction form
    18,738.29/28,110.87 = 6,257.13/x
  3. Step 3: Cross multiply
    18,738.29x = 28,110.87 × 6,257.13
  4. Step 4: Simplify right side
    18,738.29x = 175,893,368.00
  5. Step 5: Solve for x
    x = 175,893,368.00/18,738.29
  6. Step 6: Final answer
    x = 9,386.84

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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.