Home / 13,480.38-18,603.11-7,815.54

Finding the Fourth Proportional to 13,480.38, 18,603.11 and 7,815.54

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Solution

The fourth proportional to 13,480.38, 18,603.11 and 7,815.54 is: 10,785.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,480.38 : 18,603.11 = 7,815.54 : x
  2. Step 2: Convert to fraction form
    13,480.38/18,603.11 = 7,815.54/x
  3. Step 3: Cross multiply
    13,480.38x = 18,603.11 × 7,815.54
  4. Step 4: Simplify right side
    13,480.38x = 145,393,350.33
  5. Step 5: Solve for x
    x = 145,393,350.33/13,480.38
  6. Step 6: Final answer
    x = 10,785.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.