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Finding the Fourth Proportional to 20,446.61, 30,655.55 and 7,956.11

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Solution

The fourth proportional to 20,446.61, 30,655.55 and 7,956.11 is: 11,928.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,446.61 : 30,655.55 = 7,956.11 : x
  2. Step 2: Convert to fraction form
    20,446.61/30,655.55 = 7,956.11/x
  3. Step 3: Cross multiply
    20,446.61x = 30,655.55 × 7,956.11
  4. Step 4: Simplify right side
    20,446.61x = 243,898,734.85
  5. Step 5: Solve for x
    x = 243,898,734.85/20,446.61
  6. Step 6: Final answer
    x = 11,928.57

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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.