Home / 20,808.96-28,717.12-11,377.28

Finding the Fourth Proportional to 20,808.96, 28,717.12 and 11,377.28

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Solution

The fourth proportional to 20,808.96, 28,717.12 and 11,377.28 is: 15,701.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.96 : 28,717.12 = 11,377.28 : x
  2. Step 2: Convert to fraction form
    20,808.96/28,717.12 = 11,377.28/x
  3. Step 3: Cross multiply
    20,808.96x = 28,717.12 × 11,377.28
  4. Step 4: Simplify right side
    20,808.96x = 326,722,715.03
  5. Step 5: Solve for x
    x = 326,722,715.03/20,808.96
  6. Step 6: Final answer
    x = 15,701.06

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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.