Home / 5,428.40-8,152.20-3,969.20

Finding the Fourth Proportional to 5,428.40, 8,152.20 and 3,969.20

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Solution

The fourth proportional to 5,428.40, 8,152.20 and 3,969.20 is: 5,960.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.40 : 8,152.20 = 3,969.20 : x
  2. Step 2: Convert to fraction form
    5,428.40/8,152.20 = 3,969.20/x
  3. Step 3: Cross multiply
    5,428.40x = 8,152.20 × 3,969.20
  4. Step 4: Simplify right side
    5,428.40x = 32,357,712.24
  5. Step 5: Solve for x
    x = 32,357,712.24/5,428.40
  6. Step 6: Final answer
    x = 5,960.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.