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Finding the Fourth Proportional to 28,051.11, 42,060.87 and 9,321.12

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Solution

The fourth proportional to 28,051.11, 42,060.87 and 9,321.12 is: 13,976.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,051.11 : 42,060.87 = 9,321.12 : x
  2. Step 2: Convert to fraction form
    28,051.11/42,060.87 = 9,321.12/x
  3. Step 3: Cross multiply
    28,051.11x = 42,060.87 × 9,321.12
  4. Step 4: Simplify right side
    28,051.11x = 392,054,416.57
  5. Step 5: Solve for x
    x = 392,054,416.57/28,051.11
  6. Step 6: Final answer
    x = 13,976.43

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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.