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Finding the Fourth Proportional to 21,651.96, 29,870.18 and 12,694.92

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Solution

The fourth proportional to 21,651.96, 29,870.18 and 12,694.92 is: 17,513.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,651.96 : 29,870.18 = 12,694.92 : x
  2. Step 2: Convert to fraction form
    21,651.96/29,870.18 = 12,694.92/x
  3. Step 3: Cross multiply
    21,651.96x = 29,870.18 × 12,694.92
  4. Step 4: Simplify right side
    21,651.96x = 379,199,545.49
  5. Step 5: Solve for x
    x = 379,199,545.49/21,651.96
  6. Step 6: Final answer
    x = 17,513.41

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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.