Home / 39,881.09-55,035.92-21,731.69

Finding the Fourth Proportional to 39,881.09, 55,035.92 and 21,731.69

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Solution

The fourth proportional to 39,881.09, 55,035.92 and 21,731.69 is: 29,989.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,881.09 : 55,035.92 = 21,731.69 : x
  2. Step 2: Convert to fraction form
    39,881.09/55,035.92 = 21,731.69/x
  3. Step 3: Cross multiply
    39,881.09x = 55,035.92 × 21,731.69
  4. Step 4: Simplify right side
    39,881.09x = 1,196,023,744.22
  5. Step 5: Solve for x
    x = 1,196,023,744.22/39,881.09
  6. Step 6: Final answer
    x = 29,989.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.