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Finding the Fourth Proportional to 15,933.57, 21,988.05 and 8,859.84

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Solution

The fourth proportional to 15,933.57, 21,988.05 and 8,859.84 is: 12,226.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,933.57 : 21,988.05 = 8,859.84 : x
  2. Step 2: Convert to fraction form
    15,933.57/21,988.05 = 8,859.84/x
  3. Step 3: Cross multiply
    15,933.57x = 21,988.05 × 8,859.84
  4. Step 4: Simplify right side
    15,933.57x = 194,810,604.91
  5. Step 5: Solve for x
    x = 194,810,604.91/15,933.57
  6. Step 6: Final answer
    x = 12,226.43

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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.