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Finding the Fourth Proportional to 28,610.72, 42,902.04 and 11,965.76

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Solution

The fourth proportional to 28,610.72, 42,902.04 and 11,965.76 is: 17,942.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,610.72 : 42,902.04 = 11,965.76 : x
  2. Step 2: Convert to fraction form
    28,610.72/42,902.04 = 11,965.76/x
  3. Step 3: Cross multiply
    28,610.72x = 42,902.04 × 11,965.76
  4. Step 4: Simplify right side
    28,610.72x = 513,355,514.15
  5. Step 5: Solve for x
    x = 513,355,514.15/28,610.72
  6. Step 6: Final answer
    x = 17,942.77

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1.5x scale

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.