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Finding the Fourth Proportional to 8,679.17, 13,019.78 and 3,135.13

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Solution

The fourth proportional to 8,679.17, 13,019.78 and 3,135.13 is: 4,703.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.17 : 13,019.78 = 3,135.13 : x
  2. Step 2: Convert to fraction form
    8,679.17/13,019.78 = 3,135.13/x
  3. Step 3: Cross multiply
    8,679.17x = 13,019.78 × 3,135.13
  4. Step 4: Simplify right side
    8,679.17x = 40,818,678.16
  5. Step 5: Solve for x
    x = 40,818,678.16/8,679.17
  6. Step 6: Final answer
    x = 4,703.06

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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.