Home / 5,281.20-7,285.28-3,938.22

Finding the Fourth Proportional to 5,281.20, 7,285.28 and 3,938.22

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Solution

The fourth proportional to 5,281.20, 7,285.28 and 3,938.22 is: 5,432.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,281.20 : 7,285.28 = 3,938.22 : x
  2. Step 2: Convert to fraction form
    5,281.20/7,285.28 = 3,938.22/x
  3. Step 3: Cross multiply
    5,281.20x = 7,285.28 × 3,938.22
  4. Step 4: Simplify right side
    5,281.20x = 28,691,015.71
  5. Step 5: Solve for x
    x = 28,691,015.71/5,281.20
  6. Step 6: Final answer
    x = 5,432.67

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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.