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Finding the Fourth Proportional to 15,062.79, 20,786.82 and 8,348.55

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Solution

The fourth proportional to 15,062.79, 20,786.82 and 8,348.55 is: 11,521.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,062.79 : 20,786.82 = 8,348.55 : x
  2. Step 2: Convert to fraction form
    15,062.79/20,786.82 = 8,348.55/x
  3. Step 3: Cross multiply
    15,062.79x = 20,786.82 × 8,348.55
  4. Step 4: Simplify right side
    15,062.79x = 173,539,806.11
  5. Step 5: Solve for x
    x = 173,539,806.11/15,062.79
  6. Step 6: Final answer
    x = 11,521.09

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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.