Home / 20,782.14-31,180.50-10,782.08

Finding the Fourth Proportional to 20,782.14, 31,180.50 and 10,782.08

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Solution

The fourth proportional to 20,782.14, 31,180.50 and 10,782.08 is: 16,176.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.14 : 31,180.50 = 10,782.08 : x
  2. Step 2: Convert to fraction form
    20,782.14/31,180.50 = 10,782.08/x
  3. Step 3: Cross multiply
    20,782.14x = 31,180.50 × 10,782.08
  4. Step 4: Simplify right side
    20,782.14x = 336,190,645.44
  5. Step 5: Solve for x
    x = 336,190,645.44/20,782.14
  6. Step 6: Final answer
    x = 16,176.90

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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.