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Finding the Fourth Proportional to 21,956.40, 30,294 and 12,524.76

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Solution

The fourth proportional to 21,956.40, 30,294 and 12,524.76 is: 17,280.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,956.40 : 30,294 = 12,524.76 : x
  2. Step 2: Convert to fraction form
    21,956.40/30,294 = 12,524.76/x
  3. Step 3: Cross multiply
    21,956.40x = 30,294 × 12,524.76
  4. Step 4: Simplify right side
    21,956.40x = 379,425,079.44
  5. Step 5: Solve for x
    x = 379,425,079.44/21,956.40
  6. Step 6: Final answer
    x = 17,280.84

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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.