Home / 28,930.60-43,385.10-20,139.40

Finding the Fourth Proportional to 28,930.60, 43,385.10 and 20,139.40

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Solution

The fourth proportional to 28,930.60, 43,385.10 and 20,139.40 is: 30,201.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,930.60 : 43,385.10 = 20,139.40 : x
  2. Step 2: Convert to fraction form
    28,930.60/43,385.10 = 20,139.40/x
  3. Step 3: Cross multiply
    28,930.60x = 43,385.10 × 20,139.40
  4. Step 4: Simplify right side
    28,930.60x = 873,749,882.94
  5. Step 5: Solve for x
    x = 873,749,882.94/28,930.60
  6. Step 6: Final answer
    x = 30,201.58

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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.