Home / 12,480.72-18,719.05-4,160.81

Finding the Fourth Proportional to 12,480.72, 18,719.05 and 4,160.81

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Solution

The fourth proportional to 12,480.72, 18,719.05 and 4,160.81 is: 6,240.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.72 : 18,719.05 = 4,160.81 : x
  2. Step 2: Convert to fraction form
    12,480.72/18,719.05 = 4,160.81/x
  3. Step 3: Cross multiply
    12,480.72x = 18,719.05 × 4,160.81
  4. Step 4: Simplify right side
    12,480.72x = 77,886,296.03
  5. Step 5: Solve for x
    x = 77,886,296.03/12,480.72
  6. Step 6: Final answer
    x = 6,240.53

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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.