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Finding the Fourth Proportional to 5,792.28, 7,993.42 and 3,139.76

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Solution

The fourth proportional to 5,792.28, 7,993.42 and 3,139.76 is: 4,332.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,792.28 : 7,993.42 = 3,139.76 : x
  2. Step 2: Convert to fraction form
    5,792.28/7,993.42 = 3,139.76/x
  3. Step 3: Cross multiply
    5,792.28x = 7,993.42 × 3,139.76
  4. Step 4: Simplify right side
    5,792.28x = 25,097,420.38
  5. Step 5: Solve for x
    x = 25,097,420.38/5,792.28
  6. Step 6: Final answer
    x = 4,332.91

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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.