Home / 21,281.44-31,901.52-11,926

Finding the Fourth Proportional to 21,281.44, 31,901.52 and 11,926

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Solution

The fourth proportional to 21,281.44, 31,901.52 and 11,926 is: 17,877.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.44 : 31,901.52 = 11,926 : x
  2. Step 2: Convert to fraction form
    21,281.44/31,901.52 = 11,926/x
  3. Step 3: Cross multiply
    21,281.44x = 31,901.52 × 11,926
  4. Step 4: Simplify right side
    21,281.44x = 380,457,527.52
  5. Step 5: Solve for x
    x = 380,457,527.52/21,281.44
  6. Step 6: Final answer
    x = 17,877.43

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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.