Home / 20,680.40-31,005.48-6,632.43

Finding the Fourth Proportional to 20,680.40, 31,005.48 and 6,632.43

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Solution

The fourth proportional to 20,680.40, 31,005.48 and 6,632.43 is: 9,943.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.40 : 31,005.48 = 6,632.43 : x
  2. Step 2: Convert to fraction form
    20,680.40/31,005.48 = 6,632.43/x
  3. Step 3: Cross multiply
    20,680.40x = 31,005.48 × 6,632.43
  4. Step 4: Simplify right side
    20,680.40x = 205,641,675.72
  5. Step 5: Solve for x
    x = 205,641,675.72/20,680.40
  6. Step 6: Final answer
    x = 9,943.80

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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.