Home / 15,122.90-20,870.30-8,408.44

Finding the Fourth Proportional to 15,122.90, 20,870.30 and 8,408.44

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Solution

The fourth proportional to 15,122.90, 20,870.30 and 8,408.44 is: 11,604.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,122.90 : 20,870.30 = 8,408.44 : x
  2. Step 2: Convert to fraction form
    15,122.90/20,870.30 = 8,408.44/x
  3. Step 3: Cross multiply
    15,122.90x = 20,870.30 × 8,408.44
  4. Step 4: Simplify right side
    15,122.90x = 175,486,665.33
  5. Step 5: Solve for x
    x = 175,486,665.33/15,122.90
  6. Step 6: Final answer
    x = 11,604.04

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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.