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Finding the Fourth Proportional to 17,721.40, 26,431.67 and 14,913.40

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Solution

The fourth proportional to 17,721.40, 26,431.67 and 14,913.40 is: 22,243.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,721.40 : 26,431.67 = 14,913.40 : x
  2. Step 2: Convert to fraction form
    17,721.40/26,431.67 = 14,913.40/x
  3. Step 3: Cross multiply
    17,721.40x = 26,431.67 × 14,913.40
  4. Step 4: Simplify right side
    17,721.40x = 394,186,067.38
  5. Step 5: Solve for x
    x = 394,186,067.38/17,721.40
  6. Step 6: Final answer
    x = 22,243.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.