Home / 20,680.47-28,539.27-11,249.06

Finding the Fourth Proportional to 20,680.47, 28,539.27 and 11,249.06

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Solution

The fourth proportional to 20,680.47, 28,539.27 and 11,249.06 is: 15,523.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.47 : 28,539.27 = 11,249.06 : x
  2. Step 2: Convert to fraction form
    20,680.47/28,539.27 = 11,249.06/x
  3. Step 3: Cross multiply
    20,680.47x = 28,539.27 × 11,249.06
  4. Step 4: Simplify right side
    20,680.47x = 321,039,817.89
  5. Step 5: Solve for x
    x = 321,039,817.89/20,680.47
  6. Step 6: Final answer
    x = 15,523.82

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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.