Home / 20,765.20-31,157.52-9,076.90

Finding the Fourth Proportional to 20,765.20, 31,157.52 and 9,076.90

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Solution

The fourth proportional to 20,765.20, 31,157.52 and 9,076.90 is: 13,619.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.20 : 31,157.52 = 9,076.90 : x
  2. Step 2: Convert to fraction form
    20,765.20/31,157.52 = 9,076.90/x
  3. Step 3: Cross multiply
    20,765.20x = 31,157.52 × 9,076.90
  4. Step 4: Simplify right side
    20,765.20x = 282,813,693.29
  5. Step 5: Solve for x
    x = 282,813,693.29/20,765.20
  6. Step 6: Final answer
    x = 13,619.60

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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.