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Finding the Fourth Proportional to 8,726.65, 13,089.87 and 2,152.90

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Solution

The fourth proportional to 8,726.65, 13,089.87 and 2,152.90 is: 3,229.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,726.65 : 13,089.87 = 2,152.90 : x
  2. Step 2: Convert to fraction form
    8,726.65/13,089.87 = 2,152.90/x
  3. Step 3: Cross multiply
    8,726.65x = 13,089.87 × 2,152.90
  4. Step 4: Simplify right side
    8,726.65x = 28,181,181.12
  5. Step 5: Solve for x
    x = 28,181,181.12/8,726.65
  6. Step 6: Final answer
    x = 3,229.32

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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.