Home / 20,372.04-28,112.40-11,988

Finding the Fourth Proportional to 20,372.04, 28,112.40 and 11,988

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Solution

The fourth proportional to 20,372.04, 28,112.40 and 11,988 is: 16,542.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.04 : 28,112.40 = 11,988 : x
  2. Step 2: Convert to fraction form
    20,372.04/28,112.40 = 11,988/x
  3. Step 3: Cross multiply
    20,372.04x = 28,112.40 × 11,988
  4. Step 4: Simplify right side
    20,372.04x = 337,011,451.20
  5. Step 5: Solve for x
    x = 337,011,451.20/20,372.04
  6. Step 6: Final answer
    x = 16,542.84

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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.