Home / 20,696.80-28,560.72-11,264.80

Finding the Fourth Proportional to 20,696.80, 28,560.72 and 11,264.80

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Solution

The fourth proportional to 20,696.80, 28,560.72 and 11,264.80 is: 15,544.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,696.80 : 28,560.72 = 11,264.80 : x
  2. Step 2: Convert to fraction form
    20,696.80/28,560.72 = 11,264.80/x
  3. Step 3: Cross multiply
    20,696.80x = 28,560.72 × 11,264.80
  4. Step 4: Simplify right side
    20,696.80x = 321,730,798.66
  5. Step 5: Solve for x
    x = 321,730,798.66/20,696.80
  6. Step 6: Final answer
    x = 15,544.95

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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.