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Finding the Fourth Proportional to 8,378.71, 12,552.27 and 6,520.84

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Solution

The fourth proportional to 8,378.71, 12,552.27 and 6,520.84 is: 9,768.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,378.71 : 12,552.27 = 6,520.84 : x
  2. Step 2: Convert to fraction form
    8,378.71/12,552.27 = 6,520.84/x
  3. Step 3: Cross multiply
    8,378.71x = 12,552.27 × 6,520.84
  4. Step 4: Simplify right side
    8,378.71x = 81,851,344.31
  5. Step 5: Solve for x
    x = 81,851,344.31/8,378.71
  6. Step 6: Final answer
    x = 9,768.97

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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.