Home / 20,425.28-30,631.44-7,944.48

Finding the Fourth Proportional to 20,425.28, 30,631.44 and 7,944.48

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Solution

The fourth proportional to 20,425.28, 30,631.44 and 7,944.48 is: 11,914.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.28 : 30,631.44 = 7,944.48 : x
  2. Step 2: Convert to fraction form
    20,425.28/30,631.44 = 7,944.48/x
  3. Step 3: Cross multiply
    20,425.28x = 30,631.44 × 7,944.48
  4. Step 4: Simplify right side
    20,425.28x = 243,350,862.45
  5. Step 5: Solve for x
    x = 243,350,862.45/20,425.28
  6. Step 6: Final answer
    x = 11,914.20

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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.