Home / 28,247.31-42,371.21-7,187.38

Finding the Fourth Proportional to 28,247.31, 42,371.21 and 7,187.38

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Solution

The fourth proportional to 28,247.31, 42,371.21 and 7,187.38 is: 10,781.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,247.31 : 42,371.21 = 7,187.38 : x
  2. Step 2: Convert to fraction form
    28,247.31/42,371.21 = 7,187.38/x
  3. Step 3: Cross multiply
    28,247.31x = 42,371.21 × 7,187.38
  4. Step 4: Simplify right side
    28,247.31x = 304,537,899.37
  5. Step 5: Solve for x
    x = 304,537,899.37/28,247.31
  6. Step 6: Final answer
    x = 10,781.13

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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.