Home / 15,934.64-21,990.41-8,861.57

Finding the Fourth Proportional to 15,934.64, 21,990.41 and 8,861.57

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Solution

The fourth proportional to 15,934.64, 21,990.41 and 8,861.57 is: 12,229.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,934.64 : 21,990.41 = 8,861.57 : x
  2. Step 2: Convert to fraction form
    15,934.64/21,990.41 = 8,861.57/x
  3. Step 3: Cross multiply
    15,934.64x = 21,990.41 × 8,861.57
  4. Step 4: Simplify right side
    15,934.64x = 194,869,513.24
  5. Step 5: Solve for x
    x = 194,869,513.24/15,934.64
  6. Step 6: Final answer
    x = 12,229.30

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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.