Home / 11,815.20-17,718.03-3,915.63

Finding the Fourth Proportional to 11,815.20, 17,718.03 and 3,915.63

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Solution

The fourth proportional to 11,815.20, 17,718.03 and 3,915.63 is: 5,871.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,815.20 : 17,718.03 = 3,915.63 : x
  2. Step 2: Convert to fraction form
    11,815.20/17,718.03 = 3,915.63/x
  3. Step 3: Cross multiply
    11,815.20x = 17,718.03 × 3,915.63
  4. Step 4: Simplify right side
    11,815.20x = 69,377,249.81
  5. Step 5: Solve for x
    x = 69,377,249.81/11,815.20
  6. Step 6: Final answer
    x = 5,871.86

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1.5x scale

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.