Home / 5,148.27-7,721.47-1,638.65

Finding the Fourth Proportional to 5,148.27, 7,721.47 and 1,638.65

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Solution

The fourth proportional to 5,148.27, 7,721.47 and 1,638.65 is: 2,457.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,148.27 : 7,721.47 = 1,638.65 : x
  2. Step 2: Convert to fraction form
    5,148.27/7,721.47 = 1,638.65/x
  3. Step 3: Cross multiply
    5,148.27x = 7,721.47 × 1,638.65
  4. Step 4: Simplify right side
    5,148.27x = 12,652,786.82
  5. Step 5: Solve for x
    x = 12,652,786.82/5,148.27
  6. Step 6: Final answer
    x = 2,457.68

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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.