Home / 21,289.12-31,933.68-11,924.71

Finding the Fourth Proportional to 21,289.12, 31,933.68 and 11,924.71

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Solution

The fourth proportional to 21,289.12, 31,933.68 and 11,924.71 is: 17,887.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.12 : 31,933.68 = 11,924.71 : x
  2. Step 2: Convert to fraction form
    21,289.12/31,933.68 = 11,924.71/x
  3. Step 3: Cross multiply
    21,289.12x = 31,933.68 × 11,924.71
  4. Step 4: Simplify right side
    21,289.12x = 380,799,873.23
  5. Step 5: Solve for x
    x = 380,799,873.23/21,289.12
  6. Step 6: Final answer
    x = 17,887.07

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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.