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Finding the Fourth Proportional to 5,661.28, 7,812.01 and 3,142.79

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Solution

The fourth proportional to 5,661.28, 7,812.01 and 3,142.79 is: 4,336.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,661.28 : 7,812.01 = 3,142.79 : x
  2. Step 2: Convert to fraction form
    5,661.28/7,812.01 = 3,142.79/x
  3. Step 3: Cross multiply
    5,661.28x = 7,812.01 × 3,142.79
  4. Step 4: Simplify right side
    5,661.28x = 24,551,506.91
  5. Step 5: Solve for x
    x = 24,551,506.91/5,661.28
  6. Step 6: Final answer
    x = 4,336.74

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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.