Home / 20,573.20-28,390.80-11,141.65

Finding the Fourth Proportional to 20,573.20, 28,390.80 and 11,141.65

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Solution

The fourth proportional to 20,573.20, 28,390.80 and 11,141.65 is: 15,375.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,573.20 : 28,390.80 = 11,141.65 : x
  2. Step 2: Convert to fraction form
    20,573.20/28,390.80 = 11,141.65/x
  3. Step 3: Cross multiply
    20,573.20x = 28,390.80 × 11,141.65
  4. Step 4: Simplify right side
    20,573.20x = 316,320,356.82
  5. Step 5: Solve for x
    x = 316,320,356.82/20,573.20
  6. Step 6: Final answer
    x = 15,375.36

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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.