Home / 20,926.78-28,879.26-11,366.70

Finding the Fourth Proportional to 20,926.78, 28,879.26 and 11,366.70

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Solution

The fourth proportional to 20,926.78, 28,879.26 and 11,366.70 is: 15,686.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,926.78 : 28,879.26 = 11,366.70 : x
  2. Step 2: Convert to fraction form
    20,926.78/28,879.26 = 11,366.70/x
  3. Step 3: Cross multiply
    20,926.78x = 28,879.26 × 11,366.70
  4. Step 4: Simplify right side
    20,926.78x = 328,261,884.64
  5. Step 5: Solve for x
    x = 328,261,884.64/20,926.78
  6. Step 6: Final answer
    x = 15,686.21

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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.