Home / 39,811.32-54,939.87-21,905.82

Finding the Fourth Proportional to 39,811.32, 54,939.87 and 21,905.82

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Solution

The fourth proportional to 39,811.32, 54,939.87 and 21,905.82 is: 30,230.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,811.32 : 54,939.87 = 21,905.82 : x
  2. Step 2: Convert to fraction form
    39,811.32/54,939.87 = 21,905.82/x
  3. Step 3: Cross multiply
    39,811.32x = 54,939.87 × 21,905.82
  4. Step 4: Simplify right side
    39,811.32x = 1,203,502,903.04
  5. Step 5: Solve for x
    x = 1,203,502,903.04/39,811.32
  6. Step 6: Final answer
    x = 30,230.17

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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.