Home / 20,847.90-28,770.15-11,287.89

Finding the Fourth Proportional to 20,847.90, 28,770.15 and 11,287.89

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Solution

The fourth proportional to 20,847.90, 28,770.15 and 11,287.89 is: 15,577.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.90 : 28,770.15 = 11,287.89 : x
  2. Step 2: Convert to fraction form
    20,847.90/28,770.15 = 11,287.89/x
  3. Step 3: Cross multiply
    20,847.90x = 28,770.15 × 11,287.89
  4. Step 4: Simplify right side
    20,847.90x = 324,754,232.04
  5. Step 5: Solve for x
    x = 324,754,232.04/20,847.90
  6. Step 6: Final answer
    x = 15,577.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.