Home / 39,787.86-54,905.55-21,881.71

Finding the Fourth Proportional to 39,787.86, 54,905.55 and 21,881.71

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Solution

The fourth proportional to 39,787.86, 54,905.55 and 21,881.71 is: 30,195.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,787.86 : 54,905.55 = 21,881.71 : x
  2. Step 2: Convert to fraction form
    39,787.86/54,905.55 = 21,881.71/x
  3. Step 3: Cross multiply
    39,787.86x = 54,905.55 × 21,881.71
  4. Step 4: Simplify right side
    39,787.86x = 1,201,427,309.07
  5. Step 5: Solve for x
    x = 1,201,427,309.07/39,787.86
  6. Step 6: Final answer
    x = 30,195.83

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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.