Home / 28,115.10-42,172.65-7,338.60

Finding the Fourth Proportional to 28,115.10, 42,172.65 and 7,338.60

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Solution

The fourth proportional to 28,115.10, 42,172.65 and 7,338.60 is: 11,007.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.10 : 42,172.65 = 7,338.60 : x
  2. Step 2: Convert to fraction form
    28,115.10/42,172.65 = 7,338.60/x
  3. Step 3: Cross multiply
    28,115.10x = 42,172.65 × 7,338.60
  4. Step 4: Simplify right side
    28,115.10x = 309,488,209.29
  5. Step 5: Solve for x
    x = 309,488,209.29/28,115.10
  6. Step 6: Final answer
    x = 11,007.90

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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.