Home / 20,804.16-31,216.38-9,115.86

Finding the Fourth Proportional to 20,804.16, 31,216.38 and 9,115.86

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Solution

The fourth proportional to 20,804.16, 31,216.38 and 9,115.86 is: 13,678.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,804.16 : 31,216.38 = 9,115.86 : x
  2. Step 2: Convert to fraction form
    20,804.16/31,216.38 = 9,115.86/x
  3. Step 3: Cross multiply
    20,804.16x = 31,216.38 × 9,115.86
  4. Step 4: Simplify right side
    20,804.16x = 284,564,149.79
  5. Step 5: Solve for x
    x = 284,564,149.79/20,804.16
  6. Step 6: Final answer
    x = 13,678.23

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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.