Home / 20,705.68-28,580.29-11,759.14

Finding the Fourth Proportional to 20,705.68, 28,580.29 and 11,759.14

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Solution

The fourth proportional to 20,705.68, 28,580.29 and 11,759.14 is: 16,231.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,705.68 : 28,580.29 = 11,759.14 : x
  2. Step 2: Convert to fraction form
    20,705.68/28,580.29 = 11,759.14/x
  3. Step 3: Cross multiply
    20,705.68x = 28,580.29 × 11,759.14
  4. Step 4: Simplify right side
    20,705.68x = 336,079,732.20
  5. Step 5: Solve for x
    x = 336,079,732.20/20,705.68
  6. Step 6: Final answer
    x = 16,231.28

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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.