Home / 20,960.64-31,414.12-10,289.44

Finding the Fourth Proportional to 20,960.64, 31,414.12 and 10,289.44

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Solution

The fourth proportional to 20,960.64, 31,414.12 and 10,289.44 is: 15,420.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,960.64 : 31,414.12 = 10,289.44 : x
  2. Step 2: Convert to fraction form
    20,960.64/31,414.12 = 10,289.44/x
  3. Step 3: Cross multiply
    20,960.64x = 31,414.12 × 10,289.44
  4. Step 4: Simplify right side
    20,960.64x = 323,233,702.89
  5. Step 5: Solve for x
    x = 323,233,702.89/20,960.64
  6. Step 6: Final answer
    x = 15,420.98

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1.5x scale

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.