Home / 20,939.52-28,898.88-11,988

Finding the Fourth Proportional to 20,939.52, 28,898.88 and 11,988

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Solution

The fourth proportional to 20,939.52, 28,898.88 and 11,988 is: 16,544.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.52 : 28,898.88 = 11,988 : x
  2. Step 2: Convert to fraction form
    20,939.52/28,898.88 = 11,988/x
  3. Step 3: Cross multiply
    20,939.52x = 28,898.88 × 11,988
  4. Step 4: Simplify right side
    20,939.52x = 346,439,773.44
  5. Step 5: Solve for x
    x = 346,439,773.44/20,939.52
  6. Step 6: Final answer
    x = 16,544.78

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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.