Home / 20,517.78-30,765.72-10,647.12

Finding the Fourth Proportional to 20,517.78, 30,765.72 and 10,647.12

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Solution

The fourth proportional to 20,517.78, 30,765.72 and 10,647.12 is: 15,965.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.78 : 30,765.72 = 10,647.12 : x
  2. Step 2: Convert to fraction form
    20,517.78/30,765.72 = 10,647.12/x
  3. Step 3: Cross multiply
    20,517.78x = 30,765.72 × 10,647.12
  4. Step 4: Simplify right side
    20,517.78x = 327,566,312.73
  5. Step 5: Solve for x
    x = 327,566,312.73/20,517.78
  6. Step 6: Final answer
    x = 15,965.00

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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.