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Finding the Fourth Proportional to 8,478.57, 12,718.22 and 2,238.84

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Solution

The fourth proportional to 8,478.57, 12,718.22 and 2,238.84 is: 3,358.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.57 : 12,718.22 = 2,238.84 : x
  2. Step 2: Convert to fraction form
    8,478.57/12,718.22 = 2,238.84/x
  3. Step 3: Cross multiply
    8,478.57x = 12,718.22 × 2,238.84
  4. Step 4: Simplify right side
    8,478.57x = 28,474,048.47
  5. Step 5: Solve for x
    x = 28,474,048.47/8,478.57
  6. Step 6: Final answer
    x = 3,358.35

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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.