Home / 20,378.60-30,560.70-7,231.40

Finding the Fourth Proportional to 20,378.60, 30,560.70 and 7,231.40

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Solution

The fourth proportional to 20,378.60, 30,560.70 and 7,231.40 is: 10,844.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.60 : 30,560.70 = 7,231.40 : x
  2. Step 2: Convert to fraction form
    20,378.60/30,560.70 = 7,231.40/x
  3. Step 3: Cross multiply
    20,378.60x = 30,560.70 × 7,231.40
  4. Step 4: Simplify right side
    20,378.60x = 220,996,645.98
  5. Step 5: Solve for x
    x = 220,996,645.98/20,378.60
  6. Step 6: Final answer
    x = 10,844.55

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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.