Home / 20,805.39-28,711.46-11,373.95

Finding the Fourth Proportional to 20,805.39, 28,711.46 and 11,373.95

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Solution

The fourth proportional to 20,805.39, 28,711.46 and 11,373.95 is: 15,696.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.39 : 28,711.46 = 11,373.95 : x
  2. Step 2: Convert to fraction form
    20,805.39/28,711.46 = 11,373.95/x
  3. Step 3: Cross multiply
    20,805.39x = 28,711.46 × 11,373.95
  4. Step 4: Simplify right side
    20,805.39x = 326,562,810.68
  5. Step 5: Solve for x
    x = 326,562,810.68/20,805.39
  6. Step 6: Final answer
    x = 15,696.07

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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.