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Finding the Fourth Proportional to 18,888.92, 26,072.20 and 12,601.28

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Solution

The fourth proportional to 18,888.92, 26,072.20 and 12,601.28 is: 17,393.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.92 : 26,072.20 = 12,601.28 : x
  2. Step 2: Convert to fraction form
    18,888.92/26,072.20 = 12,601.28/x
  3. Step 3: Cross multiply
    18,888.92x = 26,072.20 × 12,601.28
  4. Step 4: Simplify right side
    18,888.92x = 328,543,092.42
  5. Step 5: Solve for x
    x = 328,543,092.42/18,888.92
  6. Step 6: Final answer
    x = 17,393.43

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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.