Home / 20,927.31-28,879.80-11,367.24

Finding the Fourth Proportional to 20,927.31, 28,879.80 and 11,367.24

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Solution

The fourth proportional to 20,927.31, 28,879.80 and 11,367.24 is: 15,686.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,927.31 : 28,879.80 = 11,367.24 : x
  2. Step 2: Convert to fraction form
    20,927.31/28,879.80 = 11,367.24/x
  3. Step 3: Cross multiply
    20,927.31x = 28,879.80 × 11,367.24
  4. Step 4: Simplify right side
    20,927.31x = 328,283,617.75
  5. Step 5: Solve for x
    x = 328,283,617.75/20,927.31
  6. Step 6: Final answer
    x = 15,686.85

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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.