Home / 20,907.60-31,310.25-18,883.54

Finding the Fourth Proportional to 20,907.60, 31,310.25 and 18,883.54

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Solution

The fourth proportional to 20,907.60, 31,310.25 and 18,883.54 is: 28,279.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.60 : 31,310.25 = 18,883.54 : x
  2. Step 2: Convert to fraction form
    20,907.60/31,310.25 = 18,883.54/x
  3. Step 3: Cross multiply
    20,907.60x = 31,310.25 × 18,883.54
  4. Step 4: Simplify right side
    20,907.60x = 591,248,358.29
  5. Step 5: Solve for x
    x = 591,248,358.29/20,907.60
  6. Step 6: Final answer
    x = 28,279.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.