Home / 20,752.20-31,128.30-5,961.60

Finding the Fourth Proportional to 20,752.20, 31,128.30 and 5,961.60

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Solution

The fourth proportional to 20,752.20, 31,128.30 and 5,961.60 is: 8,942.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,752.20 : 31,128.30 = 5,961.60 : x
  2. Step 2: Convert to fraction form
    20,752.20/31,128.30 = 5,961.60/x
  3. Step 3: Cross multiply
    20,752.20x = 31,128.30 × 5,961.60
  4. Step 4: Simplify right side
    20,752.20x = 185,574,473.28
  5. Step 5: Solve for x
    x = 185,574,473.28/20,752.20
  6. Step 6: Final answer
    x = 8,942.40

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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.