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Finding the Fourth Proportional to 18,873, 28,312.74 and 5,726.70

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Solution

The fourth proportional to 18,873, 28,312.74 and 5,726.70 is: 8,591.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,873 : 28,312.74 = 5,726.70 : x
  2. Step 2: Convert to fraction form
    18,873/28,312.74 = 5,726.70/x
  3. Step 3: Cross multiply
    18,873x = 28,312.74 × 5,726.70
  4. Step 4: Simplify right side
    18,873x = 162,138,568.16
  5. Step 5: Solve for x
    x = 162,138,568.16/18,873
  6. Step 6: Final answer
    x = 8,591.03

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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.