Home / 20,855.07-31,275.99-6,811.90

Finding the Fourth Proportional to 20,855.07, 31,275.99 and 6,811.90

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Solution

The fourth proportional to 20,855.07, 31,275.99 and 6,811.90 is: 10,215.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,855.07 : 31,275.99 = 6,811.90 : x
  2. Step 2: Convert to fraction form
    20,855.07/31,275.99 = 6,811.90/x
  3. Step 3: Cross multiply
    20,855.07x = 31,275.99 × 6,811.90
  4. Step 4: Simplify right side
    20,855.07x = 213,048,838.09
  5. Step 5: Solve for x
    x = 213,048,838.09/20,855.07
  6. Step 6: Final answer
    x = 10,215.69

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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.