Home / 21,655-32,388.66-12,749.11

Finding the Fourth Proportional to 21,655, 32,388.66 and 12,749.11

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Solution

The fourth proportional to 21,655, 32,388.66 and 12,749.11 is: 19,068.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,655 : 32,388.66 = 12,749.11 : x
  2. Step 2: Convert to fraction form
    21,655/32,388.66 = 12,749.11/x
  3. Step 3: Cross multiply
    21,655x = 32,388.66 × 12,749.11
  4. Step 4: Simplify right side
    21,655x = 412,926,589.09
  5. Step 5: Solve for x
    x = 412,926,589.09/21,655
  6. Step 6: Final answer
    x = 19,068.42

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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.