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Finding the Fourth Proportional to 19,793.31, 29,648.66 and 11,870.70

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Solution

The fourth proportional to 19,793.31, 29,648.66 and 11,870.70 is: 17,781.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,793.31 : 29,648.66 = 11,870.70 : x
  2. Step 2: Convert to fraction form
    19,793.31/29,648.66 = 11,870.70/x
  3. Step 3: Cross multiply
    19,793.31x = 29,648.66 × 11,870.70
  4. Step 4: Simplify right side
    19,793.31x = 351,950,288.91
  5. Step 5: Solve for x
    x = 351,950,288.91/19,793.31
  6. Step 6: Final answer
    x = 17,781.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.