Home / 20,943.54-31,425.93-13,928.43

Finding the Fourth Proportional to 20,943.54, 31,425.93 and 13,928.43

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Solution

The fourth proportional to 20,943.54, 31,425.93 and 13,928.43 is: 20,899.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.54 : 31,425.93 = 13,928.43 : x
  2. Step 2: Convert to fraction form
    20,943.54/31,425.93 = 13,928.43/x
  3. Step 3: Cross multiply
    20,943.54x = 31,425.93 × 13,928.43
  4. Step 4: Simplify right side
    20,943.54x = 437,713,866.19
  5. Step 5: Solve for x
    x = 437,713,866.19/20,943.54
  6. Step 6: Final answer
    x = 20,899.71

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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.