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Finding the Fourth Proportional to 5,675.28, 7,831.80 and 3,191.28

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Solution

The fourth proportional to 5,675.28, 7,831.80 and 3,191.28 is: 4,403.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,675.28 : 7,831.80 = 3,191.28 : x
  2. Step 2: Convert to fraction form
    5,675.28/7,831.80 = 3,191.28/x
  3. Step 3: Cross multiply
    5,675.28x = 7,831.80 × 3,191.28
  4. Step 4: Simplify right side
    5,675.28x = 24,993,466.70
  5. Step 5: Solve for x
    x = 24,993,466.70/5,675.28
  6. Step 6: Final answer
    x = 4,403.92

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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.