Home / 21,169.13-31,756.72-6,379.21

Finding the Fourth Proportional to 21,169.13, 31,756.72 and 6,379.21

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Solution

The fourth proportional to 21,169.13, 31,756.72 and 6,379.21 is: 9,569.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,169.13 : 31,756.72 = 6,379.21 : x
  2. Step 2: Convert to fraction form
    21,169.13/31,756.72 = 6,379.21/x
  3. Step 3: Cross multiply
    21,169.13x = 31,756.72 × 6,379.21
  4. Step 4: Simplify right side
    21,169.13x = 202,582,651.84
  5. Step 5: Solve for x
    x = 202,582,651.84/21,169.13
  6. Step 6: Final answer
    x = 9,569.72

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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.