Home / 20,879.13-31,328.73-9,784.02

Finding the Fourth Proportional to 20,879.13, 31,328.73 and 9,784.02

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Solution

The fourth proportional to 20,879.13, 31,328.73 and 9,784.02 is: 14,680.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.13 : 31,328.73 = 9,784.02 : x
  2. Step 2: Convert to fraction form
    20,879.13/31,328.73 = 9,784.02/x
  3. Step 3: Cross multiply
    20,879.13x = 31,328.73 × 9,784.02
  4. Step 4: Simplify right side
    20,879.13x = 306,520,920.89
  5. Step 5: Solve for x
    x = 306,520,920.89/20,879.13
  6. Step 6: Final answer
    x = 14,680.73

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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.