Home / 20,573.16-28,390.90-11,141.72

Finding the Fourth Proportional to 20,573.16, 28,390.90 and 11,141.72

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Solution

The fourth proportional to 20,573.16, 28,390.90 and 11,141.72 is: 15,375.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,573.16 : 28,390.90 = 11,141.72 : x
  2. Step 2: Convert to fraction form
    20,573.16/28,390.90 = 11,141.72/x
  3. Step 3: Cross multiply
    20,573.16x = 28,390.90 × 11,141.72
  4. Step 4: Simplify right side
    20,573.16x = 316,323,458.35
  5. Step 5: Solve for x
    x = 316,323,458.35/20,573.16
  6. Step 6: Final answer
    x = 15,375.54

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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.