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Finding the Fourth Proportional to 8,717.62, 12,026.04 and 5,178.34

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Solution

The fourth proportional to 8,717.62, 12,026.04 and 5,178.34 is: 7,143.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,717.62 : 12,026.04 = 5,178.34 : x
  2. Step 2: Convert to fraction form
    8,717.62/12,026.04 = 5,178.34/x
  3. Step 3: Cross multiply
    8,717.62x = 12,026.04 × 5,178.34
  4. Step 4: Simplify right side
    8,717.62x = 62,274,923.97
  5. Step 5: Solve for x
    x = 62,274,923.97/8,717.62
  6. Step 6: Final answer
    x = 7,143.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.