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Finding the Fourth Proportional to 17,178.61, 25,766.07 and 8,386.87

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Solution

The fourth proportional to 17,178.61, 25,766.07 and 8,386.87 is: 12,579.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,178.61 : 25,766.07 = 8,386.87 : x
  2. Step 2: Convert to fraction form
    17,178.61/25,766.07 = 8,386.87/x
  3. Step 3: Cross multiply
    17,178.61x = 25,766.07 × 8,386.87
  4. Step 4: Simplify right side
    17,178.61x = 216,096,679.50
  5. Step 5: Solve for x
    x = 216,096,679.50/17,178.61
  6. Step 6: Final answer
    x = 12,579.40

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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.