Home / 21,335.76-31,933.92-19,289.56

Finding the Fourth Proportional to 21,335.76, 31,933.92 and 19,289.56

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Solution

The fourth proportional to 21,335.76, 31,933.92 and 19,289.56 is: 28,871.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,335.76 : 31,933.92 = 19,289.56 : x
  2. Step 2: Convert to fraction form
    21,335.76/31,933.92 = 19,289.56/x
  3. Step 3: Cross multiply
    21,335.76x = 31,933.92 × 19,289.56
  4. Step 4: Simplify right side
    21,335.76x = 615,991,265.88
  5. Step 5: Solve for x
    x = 615,991,265.88/21,335.76
  6. Step 6: Final answer
    x = 28,871.31

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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.