Home / 20,945.20-31,380.88-11,062.64

Finding the Fourth Proportional to 20,945.20, 31,380.88 and 11,062.64

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Solution

The fourth proportional to 20,945.20, 31,380.88 and 11,062.64 is: 16,574.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.20 : 31,380.88 = 11,062.64 : x
  2. Step 2: Convert to fraction form
    20,945.20/31,380.88 = 11,062.64/x
  3. Step 3: Cross multiply
    20,945.20x = 31,380.88 × 11,062.64
  4. Step 4: Simplify right side
    20,945.20x = 347,155,378.32
  5. Step 5: Solve for x
    x = 347,155,378.32/20,945.20
  6. Step 6: Final answer
    x = 16,574.46

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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.