Home / 39,876.22-55,031.68-21,971.22

Finding the Fourth Proportional to 39,876.22, 55,031.68 and 21,971.22

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Solution

The fourth proportional to 39,876.22, 55,031.68 and 21,971.22 is: 30,321.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,876.22 : 55,031.68 = 21,971.22 : x
  2. Step 2: Convert to fraction form
    39,876.22/55,031.68 = 21,971.22/x
  3. Step 3: Cross multiply
    39,876.22x = 55,031.68 × 21,971.22
  4. Step 4: Simplify right side
    39,876.22x = 1,209,113,148.25
  5. Step 5: Solve for x
    x = 1,209,113,148.25/39,876.22
  6. Step 6: Final answer
    x = 30,321.66

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1.5x scale

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.