Home / 20,809.10-28,716.55-11,377.66

Finding the Fourth Proportional to 20,809.10, 28,716.55 and 11,377.66

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Solution

The fourth proportional to 20,809.10, 28,716.55 and 11,377.66 is: 15,701.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.10 : 28,716.55 = 11,377.66 : x
  2. Step 2: Convert to fraction form
    20,809.10/28,716.55 = 11,377.66/x
  3. Step 3: Cross multiply
    20,809.10x = 28,716.55 × 11,377.66
  4. Step 4: Simplify right side
    20,809.10x = 326,727,070.48
  5. Step 5: Solve for x
    x = 326,727,070.48/20,809.10
  6. Step 6: Final answer
    x = 15,701.17

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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.