Home / 20,908.78-31,359.93-6,114.22

Finding the Fourth Proportional to 20,908.78, 31,359.93 and 6,114.22

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Solution

The fourth proportional to 20,908.78, 31,359.93 and 6,114.22 is: 9,170.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.78 : 31,359.93 = 6,114.22 : x
  2. Step 2: Convert to fraction form
    20,908.78/31,359.93 = 6,114.22/x
  3. Step 3: Cross multiply
    20,908.78x = 31,359.93 × 6,114.22
  4. Step 4: Simplify right side
    20,908.78x = 191,741,511.20
  5. Step 5: Solve for x
    x = 191,741,511.20/20,908.78
  6. Step 6: Final answer
    x = 9,170.38

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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.