Home / 20,809.16-28,716.49-11,377.75

Finding the Fourth Proportional to 20,809.16, 28,716.49 and 11,377.75

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Solution

The fourth proportional to 20,809.16, 28,716.49 and 11,377.75 is: 15,701.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.16 : 28,716.49 = 11,377.75 : x
  2. Step 2: Convert to fraction form
    20,809.16/28,716.49 = 11,377.75/x
  3. Step 3: Cross multiply
    20,809.16x = 28,716.49 × 11,377.75
  4. Step 4: Simplify right side
    20,809.16x = 326,729,044.10
  5. Step 5: Solve for x
    x = 326,729,044.10/20,809.16
  6. Step 6: Final answer
    x = 15,701.21

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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.