Home / 28,979.11-39,977.05-18,902.98

Finding the Fourth Proportional to 28,979.11, 39,977.05 and 18,902.98

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Solution

The fourth proportional to 28,979.11, 39,977.05 and 18,902.98 is: 26,076.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,979.11 : 39,977.05 = 18,902.98 : x
  2. Step 2: Convert to fraction form
    28,979.11/39,977.05 = 18,902.98/x
  3. Step 3: Cross multiply
    28,979.11x = 39,977.05 × 18,902.98
  4. Step 4: Simplify right side
    28,979.11x = 755,685,376.61
  5. Step 5: Solve for x
    x = 755,685,376.61/28,979.11
  6. Step 6: Final answer
    x = 26,076.90

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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.