Home / 20,727.78-31,091.64-6,876.78

Finding the Fourth Proportional to 20,727.78, 31,091.64 and 6,876.78

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Solution

The fourth proportional to 20,727.78, 31,091.64 and 6,876.78 is: 10,315.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,727.78 : 31,091.64 = 6,876.78 : x
  2. Step 2: Convert to fraction form
    20,727.78/31,091.64 = 6,876.78/x
  3. Step 3: Cross multiply
    20,727.78x = 31,091.64 × 6,876.78
  4. Step 4: Simplify right side
    20,727.78x = 213,810,368.12
  5. Step 5: Solve for x
    x = 213,810,368.12/20,727.78
  6. Step 6: Final answer
    x = 10,315.16

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1.5x scale

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.