Home / 10,187.10-15,278.76-2,791.80

Finding the Fourth Proportional to 10,187.10, 15,278.76 and 2,791.80

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Solution

The fourth proportional to 10,187.10, 15,278.76 and 2,791.80 is: 4,187.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,187.10 : 15,278.76 = 2,791.80 : x
  2. Step 2: Convert to fraction form
    10,187.10/15,278.76 = 2,791.80/x
  3. Step 3: Cross multiply
    10,187.10x = 15,278.76 × 2,791.80
  4. Step 4: Simplify right side
    10,187.10x = 42,655,242.17
  5. Step 5: Solve for x
    x = 42,655,242.17/10,187.10
  6. Step 6: Final answer
    x = 4,187.18

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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.