Home / 39,876.96-55,032.72-21,971.97

Finding the Fourth Proportional to 39,876.96, 55,032.72 and 21,971.97

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Solution

The fourth proportional to 39,876.96, 55,032.72 and 21,971.97 is: 30,322.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,876.96 : 55,032.72 = 21,971.97 : x
  2. Step 2: Convert to fraction form
    39,876.96/55,032.72 = 21,971.97/x
  3. Step 3: Cross multiply
    39,876.96x = 55,032.72 × 21,971.97
  4. Step 4: Simplify right side
    39,876.96x = 1,209,177,272.86
  5. Step 5: Solve for x
    x = 1,209,177,272.86/39,876.96
  6. Step 6: Final answer
    x = 30,322.70

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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.