Home / 5,215.24-7,818.40-2,581.53

Finding the Fourth Proportional to 5,215.24, 7,818.40 and 2,581.53

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Solution

The fourth proportional to 5,215.24, 7,818.40 and 2,581.53 is: 3,870.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.24 : 7,818.40 = 2,581.53 : x
  2. Step 2: Convert to fraction form
    5,215.24/7,818.40 = 2,581.53/x
  3. Step 3: Cross multiply
    5,215.24x = 7,818.40 × 2,581.53
  4. Step 4: Simplify right side
    5,215.24x = 20,183,434.15
  5. Step 5: Solve for x
    x = 20,183,434.15/5,215.24
  6. Step 6: Final answer
    x = 3,870.09

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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.