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Finding the Fourth Proportional to 15,118.11, 20,863.23 and 8,312.41

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Solution

The fourth proportional to 15,118.11, 20,863.23 and 8,312.41 is: 11,471.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,118.11 : 20,863.23 = 8,312.41 : x
  2. Step 2: Convert to fraction form
    15,118.11/20,863.23 = 8,312.41/x
  3. Step 3: Cross multiply
    15,118.11x = 20,863.23 × 8,312.41
  4. Step 4: Simplify right side
    15,118.11x = 173,423,851.93
  5. Step 5: Solve for x
    x = 173,423,851.93/15,118.11
  6. Step 6: Final answer
    x = 11,471.27

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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.