Home / 5,315.24-7,972.96-1,419.61

Finding the Fourth Proportional to 5,315.24, 7,972.96 and 1,419.61

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Solution

The fourth proportional to 5,315.24, 7,972.96 and 1,419.61 is: 2,129.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,315.24 : 7,972.96 = 1,419.61 : x
  2. Step 2: Convert to fraction form
    5,315.24/7,972.96 = 1,419.61/x
  3. Step 3: Cross multiply
    5,315.24x = 7,972.96 × 1,419.61
  4. Step 4: Simplify right side
    5,315.24x = 11,318,483.88
  5. Step 5: Solve for x
    x = 11,318,483.88/5,315.24
  6. Step 6: Final answer
    x = 2,129.44

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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.