Home / 20,211.60-30,319.29-10,359.30

Finding the Fourth Proportional to 20,211.60, 30,319.29 and 10,359.30

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Solution

The fourth proportional to 20,211.60, 30,319.29 and 10,359.30 is: 15,539.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.60 : 30,319.29 = 10,359.30 : x
  2. Step 2: Convert to fraction form
    20,211.60/30,319.29 = 10,359.30/x
  3. Step 3: Cross multiply
    20,211.60x = 30,319.29 × 10,359.30
  4. Step 4: Simplify right side
    20,211.60x = 314,086,620.90
  5. Step 5: Solve for x
    x = 314,086,620.90/20,211.60
  6. Step 6: Final answer
    x = 15,539.92

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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.