Home / 15,211.62-20,990.61-8,922.78

Finding the Fourth Proportional to 15,211.62, 20,990.61 and 8,922.78

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Solution

The fourth proportional to 15,211.62, 20,990.61 and 8,922.78 is: 12,312.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,211.62 : 20,990.61 = 8,922.78 : x
  2. Step 2: Convert to fraction form
    15,211.62/20,990.61 = 8,922.78/x
  3. Step 3: Cross multiply
    15,211.62x = 20,990.61 × 8,922.78
  4. Step 4: Simplify right side
    15,211.62x = 187,294,595.10
  5. Step 5: Solve for x
    x = 187,294,595.10/15,211.62
  6. Step 6: Final answer
    x = 12,312.60

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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.