Home / 20,805.66-31,208.04-5,223.24

Finding the Fourth Proportional to 20,805.66, 31,208.04 and 5,223.24

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Solution

The fourth proportional to 20,805.66, 31,208.04 and 5,223.24 is: 7,834.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.66 : 31,208.04 = 5,223.24 : x
  2. Step 2: Convert to fraction form
    20,805.66/31,208.04 = 5,223.24/x
  3. Step 3: Cross multiply
    20,805.66x = 31,208.04 × 5,223.24
  4. Step 4: Simplify right side
    20,805.66x = 163,007,082.85
  5. Step 5: Solve for x
    x = 163,007,082.85/20,805.66
  6. Step 6: Final answer
    x = 7,834.75

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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.