Home / 12,480.76-18,721.21-5,085.30

Finding the Fourth Proportional to 12,480.76, 18,721.21 and 5,085.30

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Solution

The fourth proportional to 12,480.76, 18,721.21 and 5,085.30 is: 7,627.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.76 : 18,721.21 = 5,085.30 : x
  2. Step 2: Convert to fraction form
    12,480.76/18,721.21 = 5,085.30/x
  3. Step 3: Cross multiply
    12,480.76x = 18,721.21 × 5,085.30
  4. Step 4: Simplify right side
    12,480.76x = 95,202,969.21
  5. Step 5: Solve for x
    x = 95,202,969.21/12,480.76
  6. Step 6: Final answer
    x = 7,627.98

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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.