Home / 20,787.24-31,162.40-7,636.52

Finding the Fourth Proportional to 20,787.24, 31,162.40 and 7,636.52

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Solution

The fourth proportional to 20,787.24, 31,162.40 and 7,636.52 is: 11,448.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.24 : 31,162.40 = 7,636.52 : x
  2. Step 2: Convert to fraction form
    20,787.24/31,162.40 = 7,636.52/x
  3. Step 3: Cross multiply
    20,787.24x = 31,162.40 × 7,636.52
  4. Step 4: Simplify right side
    20,787.24x = 237,972,290.85
  5. Step 5: Solve for x
    x = 237,972,290.85/20,787.24
  6. Step 6: Final answer
    x = 11,448.00

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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.