Home / 28,913.10-43,358.85-20,121.90

Finding the Fourth Proportional to 28,913.10, 43,358.85 and 20,121.90

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Solution

The fourth proportional to 28,913.10, 43,358.85 and 20,121.90 is: 30,175.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,913.10 : 43,358.85 = 20,121.90 : x
  2. Step 2: Convert to fraction form
    28,913.10/43,358.85 = 20,121.90/x
  3. Step 3: Cross multiply
    28,913.10x = 43,358.85 × 20,121.90
  4. Step 4: Simplify right side
    28,913.10x = 872,462,443.82
  5. Step 5: Solve for x
    x = 872,462,443.82/28,913.10
  6. Step 6: Final answer
    x = 30,175.33

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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.