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Finding the Fourth Proportional to 6,487.55, 8,954.84 and 3,970.43

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Solution

The fourth proportional to 6,487.55, 8,954.84 and 3,970.43 is: 5,480.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,487.55 : 8,954.84 = 3,970.43 : x
  2. Step 2: Convert to fraction form
    6,487.55/8,954.84 = 3,970.43/x
  3. Step 3: Cross multiply
    6,487.55x = 8,954.84 × 3,970.43
  4. Step 4: Simplify right side
    6,487.55x = 35,554,545.53
  5. Step 5: Solve for x
    x = 35,554,545.53/6,487.55
  6. Step 6: Final answer
    x = 5,480.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.