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Finding the Fourth Proportional to 8,315.71, 12,478.97 and 4,422.85

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Solution

The fourth proportional to 8,315.71, 12,478.97 and 4,422.85 is: 6,637.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,315.71 : 12,478.97 = 4,422.85 : x
  2. Step 2: Convert to fraction form
    8,315.71/12,478.97 = 4,422.85/x
  3. Step 3: Cross multiply
    8,315.71x = 12,478.97 × 4,422.85
  4. Step 4: Simplify right side
    8,315.71x = 55,192,612.46
  5. Step 5: Solve for x
    x = 55,192,612.46/8,315.71
  6. Step 6: Final answer
    x = 6,637.15

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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.