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Finding the Fourth Proportional to 19,721.71, 29,442.07 and 19,029.70

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Solution

The fourth proportional to 19,721.71, 29,442.07 and 19,029.70 is: 28,408.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,721.71 : 29,442.07 = 19,029.70 : x
  2. Step 2: Convert to fraction form
    19,721.71/29,442.07 = 19,029.70/x
  3. Step 3: Cross multiply
    19,721.71x = 29,442.07 × 19,029.70
  4. Step 4: Simplify right side
    19,721.71x = 560,273,713.03
  5. Step 5: Solve for x
    x = 560,273,713.03/19,721.71
  6. Step 6: Final answer
    x = 28,408.98

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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.