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Finding the Fourth Proportional to 15,165.30, 20,919.66 and 8,876.46

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Solution

The fourth proportional to 15,165.30, 20,919.66 and 8,876.46 is: 12,244.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,165.30 : 20,919.66 = 8,876.46 : x
  2. Step 2: Convert to fraction form
    15,165.30/20,919.66 = 8,876.46/x
  3. Step 3: Cross multiply
    15,165.30x = 20,919.66 × 8,876.46
  4. Step 4: Simplify right side
    15,165.30x = 185,692,525.20
  5. Step 5: Solve for x
    x = 185,692,525.20/15,165.30
  6. Step 6: Final answer
    x = 12,244.57

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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.