Home / 39,036.56-53,870.55-21,131.78

Finding the Fourth Proportional to 39,036.56, 53,870.55 and 21,131.78

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Solution

The fourth proportional to 39,036.56, 53,870.55 and 21,131.78 is: 29,161.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,036.56 : 53,870.55 = 21,131.78 : x
  2. Step 2: Convert to fraction form
    39,036.56/53,870.55 = 21,131.78/x
  3. Step 3: Cross multiply
    39,036.56x = 53,870.55 × 21,131.78
  4. Step 4: Simplify right side
    39,036.56x = 1,138,380,611.08
  5. Step 5: Solve for x
    x = 1,138,380,611.08/39,036.56
  6. Step 6: Final answer
    x = 29,161.91

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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.