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Finding the Fourth Proportional to 18,890.66, 28,340.04 and 5,744.10

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Solution

The fourth proportional to 18,890.66, 28,340.04 and 5,744.10 is: 8,617.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,890.66 : 28,340.04 = 5,744.10 : x
  2. Step 2: Convert to fraction form
    18,890.66/28,340.04 = 5,744.10/x
  3. Step 3: Cross multiply
    18,890.66x = 28,340.04 × 5,744.10
  4. Step 4: Simplify right side
    18,890.66x = 162,788,023.76
  5. Step 5: Solve for x
    x = 162,788,023.76/18,890.66
  6. Step 6: Final answer
    x = 8,617.38

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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.