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Finding the Fourth Proportional to 28,661.94, 43,009.52 and 12,020.49

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Solution

The fourth proportional to 28,661.94, 43,009.52 and 12,020.49 is: 18,037.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,661.94 : 43,009.52 = 12,020.49 : x
  2. Step 2: Convert to fraction form
    28,661.94/43,009.52 = 12,020.49/x
  3. Step 3: Cross multiply
    28,661.94x = 43,009.52 × 12,020.49
  4. Step 4: Simplify right side
    28,661.94x = 516,995,444.96
  5. Step 5: Solve for x
    x = 516,995,444.96/28,661.94
  6. Step 6: Final answer
    x = 18,037.70

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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.