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Finding the Fourth Proportional to 14,891.61, 20,498.94 and 12,874.11

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Solution

The fourth proportional to 14,891.61, 20,498.94 and 12,874.11 is: 17,721.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,891.61 : 20,498.94 = 12,874.11 : x
  2. Step 2: Convert to fraction form
    14,891.61/20,498.94 = 12,874.11/x
  3. Step 3: Cross multiply
    14,891.61x = 20,498.94 × 12,874.11
  4. Step 4: Simplify right side
    14,891.61x = 263,905,608.44
  5. Step 5: Solve for x
    x = 263,905,608.44/14,891.61
  6. Step 6: Final answer
    x = 17,721.76

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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.