Home / 39,612.81-54,665.71-21,707.85

Finding the Fourth Proportional to 39,612.81, 54,665.71 and 21,707.85

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Solution

The fourth proportional to 39,612.81, 54,665.71 and 21,707.85 is: 29,956.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,612.81 : 54,665.71 = 21,707.85 : x
  2. Step 2: Convert to fraction form
    39,612.81/54,665.71 = 21,707.85/x
  3. Step 3: Cross multiply
    39,612.81x = 54,665.71 × 21,707.85
  4. Step 4: Simplify right side
    39,612.81x = 1,186,675,305.66
  5. Step 5: Solve for x
    x = 1,186,675,305.66/39,612.81
  6. Step 6: Final answer
    x = 29,956.86

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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.