Home / 31,731.12-43,787.43-18,991.32

Finding the Fourth Proportional to 31,731.12, 43,787.43 and 18,991.32

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Solution

The fourth proportional to 31,731.12, 43,787.43 and 18,991.32 is: 26,207.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,731.12 : 43,787.43 = 18,991.32 : x
  2. Step 2: Convert to fraction form
    31,731.12/43,787.43 = 18,991.32/x
  3. Step 3: Cross multiply
    31,731.12x = 43,787.43 × 18,991.32
  4. Step 4: Simplify right side
    31,731.12x = 831,581,002.12
  5. Step 5: Solve for x
    x = 831,581,002.12/31,731.12
  6. Step 6: Final answer
    x = 26,207.11

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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.