Home / 7,425.19-11,139.62-3,420.70

Finding the Fourth Proportional to 7,425.19, 11,139.62 and 3,420.70

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Solution

The fourth proportional to 7,425.19, 11,139.62 and 3,420.70 is: 5,131.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,425.19 : 11,139.62 = 3,420.70 : x
  2. Step 2: Convert to fraction form
    7,425.19/11,139.62 = 3,420.70/x
  3. Step 3: Cross multiply
    7,425.19x = 11,139.62 × 3,420.70
  4. Step 4: Simplify right side
    7,425.19x = 38,105,298.13
  5. Step 5: Solve for x
    x = 38,105,298.13/7,425.19
  6. Step 6: Final answer
    x = 5,131.90

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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.