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Finding the Fourth Proportional to 14,959.66, 20,638.59 and 8,992.78

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Solution

The fourth proportional to 14,959.66, 20,638.59 and 8,992.78 is: 12,406.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,959.66 : 20,638.59 = 8,992.78 : x
  2. Step 2: Convert to fraction form
    14,959.66/20,638.59 = 8,992.78/x
  3. Step 3: Cross multiply
    14,959.66x = 20,638.59 × 8,992.78
  4. Step 4: Simplify right side
    14,959.66x = 185,598,299.38
  5. Step 5: Solve for x
    x = 185,598,299.38/14,959.66
  6. Step 6: Final answer
    x = 12,406.59

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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.