Home / 20,936.72-31,387.80-15,389.84

Finding the Fourth Proportional to 20,936.72, 31,387.80 and 15,389.84

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Solution

The fourth proportional to 20,936.72, 31,387.80 and 15,389.84 is: 23,072.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.72 : 31,387.80 = 15,389.84 : x
  2. Step 2: Convert to fraction form
    20,936.72/31,387.80 = 15,389.84/x
  3. Step 3: Cross multiply
    20,936.72x = 31,387.80 × 15,389.84
  4. Step 4: Simplify right side
    20,936.72x = 483,053,219.95
  5. Step 5: Solve for x
    x = 483,053,219.95/20,936.72
  6. Step 6: Final answer
    x = 23,072.06

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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.