Home / 20,952.52-31,442.46-7,815.40

Finding the Fourth Proportional to 20,952.52, 31,442.46 and 7,815.40

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Solution

The fourth proportional to 20,952.52, 31,442.46 and 7,815.40 is: 11,728.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,952.52 : 31,442.46 = 7,815.40 : x
  2. Step 2: Convert to fraction form
    20,952.52/31,442.46 = 7,815.40/x
  3. Step 3: Cross multiply
    20,952.52x = 31,442.46 × 7,815.40
  4. Step 4: Simplify right side
    20,952.52x = 245,735,401.88
  5. Step 5: Solve for x
    x = 245,735,401.88/20,952.52
  6. Step 6: Final answer
    x = 11,728.20

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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.