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Finding the Fourth Proportional to 8,479.92, 12,718.80 and 2,240.45

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Solution

The fourth proportional to 8,479.92, 12,718.80 and 2,240.45 is: 3,360.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,479.92 : 12,718.80 = 2,240.45 : x
  2. Step 2: Convert to fraction form
    8,479.92/12,718.80 = 2,240.45/x
  3. Step 3: Cross multiply
    8,479.92x = 12,718.80 × 2,240.45
  4. Step 4: Simplify right side
    8,479.92x = 28,495,771.87
  5. Step 5: Solve for x
    x = 28,495,771.87/8,479.92
  6. Step 6: Final answer
    x = 3,360.38

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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.