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Finding the Fourth Proportional to 5,664.81, 7,818.68 and 3,147.78

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Solution

The fourth proportional to 5,664.81, 7,818.68 and 3,147.78 is: 4,344.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,664.81 : 7,818.68 = 3,147.78 : x
  2. Step 2: Convert to fraction form
    5,664.81/7,818.68 = 3,147.78/x
  3. Step 3: Cross multiply
    5,664.81x = 7,818.68 × 3,147.78
  4. Step 4: Simplify right side
    5,664.81x = 24,611,484.53
  5. Step 5: Solve for x
    x = 24,611,484.53/5,664.81
  6. Step 6: Final answer
    x = 4,344.63

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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.