Home / 10,028.80-15,013.44-7,443.20

Finding the Fourth Proportional to 10,028.80, 15,013.44 and 7,443.20

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Solution

The fourth proportional to 10,028.80, 15,013.44 and 7,443.20 is: 11,142.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,028.80 : 15,013.44 = 7,443.20 : x
  2. Step 2: Convert to fraction form
    10,028.80/15,013.44 = 7,443.20/x
  3. Step 3: Cross multiply
    10,028.80x = 15,013.44 × 7,443.20
  4. Step 4: Simplify right side
    10,028.80x = 111,748,036.61
  5. Step 5: Solve for x
    x = 111,748,036.61/10,028.80
  6. Step 6: Final answer
    x = 11,142.71

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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.