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Finding the Fourth Proportional to 21,956.62, 30,300.18 and 11,885.08

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Solution

The fourth proportional to 21,956.62, 30,300.18 and 11,885.08 is: 16,401.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,956.62 : 30,300.18 = 11,885.08 : x
  2. Step 2: Convert to fraction form
    21,956.62/30,300.18 = 11,885.08/x
  3. Step 3: Cross multiply
    21,956.62x = 30,300.18 × 11,885.08
  4. Step 4: Simplify right side
    21,956.62x = 360,120,063.31
  5. Step 5: Solve for x
    x = 360,120,063.31/21,956.62
  6. Step 6: Final answer
    x = 16,401.43

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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.