Home / 20,787.75-31,162.59-7,630.11

Finding the Fourth Proportional to 20,787.75, 31,162.59 and 7,630.11

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Solution

The fourth proportional to 20,787.75, 31,162.59 and 7,630.11 is: 11,438.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.75 : 31,162.59 = 7,630.11 : x
  2. Step 2: Convert to fraction form
    20,787.75/31,162.59 = 7,630.11/x
  3. Step 3: Cross multiply
    20,787.75x = 31,162.59 × 7,630.11
  4. Step 4: Simplify right side
    20,787.75x = 237,773,989.58
  5. Step 5: Solve for x
    x = 237,773,989.58/20,787.75
  6. Step 6: Final answer
    x = 11,438.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.