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Finding the Fourth Proportional to 8,568.63, 12,856.77 and 5,447.80

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Solution

The fourth proportional to 8,568.63, 12,856.77 and 5,447.80 is: 8,174.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,568.63 : 12,856.77 = 5,447.80 : x
  2. Step 2: Convert to fraction form
    8,568.63/12,856.77 = 5,447.80/x
  3. Step 3: Cross multiply
    8,568.63x = 12,856.77 × 5,447.80
  4. Step 4: Simplify right side
    8,568.63x = 70,041,079.46
  5. Step 5: Solve for x
    x = 70,041,079.46/8,568.63
  6. Step 6: Final answer
    x = 8,174.13

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1.5x scale

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.