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Finding the Fourth Proportional to 17,111.08, 25,655.10 and 8,780.68

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Solution

The fourth proportional to 17,111.08, 25,655.10 and 8,780.68 is: 13,165.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,111.08 : 25,655.10 = 8,780.68 : x
  2. Step 2: Convert to fraction form
    17,111.08/25,655.10 = 8,780.68/x
  3. Step 3: Cross multiply
    17,111.08x = 25,655.10 × 8,780.68
  4. Step 4: Simplify right side
    17,111.08x = 225,269,223.47
  5. Step 5: Solve for x
    x = 225,269,223.47/17,111.08
  6. Step 6: Final answer
    x = 13,165.11

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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.