Home / 20,680.65-28,539.54-11,249.28

Finding the Fourth Proportional to 20,680.65, 28,539.54 and 11,249.28

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Solution

The fourth proportional to 20,680.65, 28,539.54 and 11,249.28 is: 15,524.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.65 : 28,539.54 = 11,249.28 : x
  2. Step 2: Convert to fraction form
    20,680.65/28,539.54 = 11,249.28/x
  3. Step 3: Cross multiply
    20,680.65x = 28,539.54 × 11,249.28
  4. Step 4: Simplify right side
    20,680.65x = 321,049,276.53
  5. Step 5: Solve for x
    x = 321,049,276.53/20,680.65
  6. Step 6: Final answer
    x = 15,524.14

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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.