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Finding the Fourth Proportional to 20,908.68, 31,341.09 and 6,865.11

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Solution

The fourth proportional to 20,908.68, 31,341.09 and 6,865.11 is: 10,290.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.68 : 31,341.09 = 6,865.11 : x
  2. Step 2: Convert to fraction form
    20,908.68/31,341.09 = 6,865.11/x
  3. Step 3: Cross multiply
    20,908.68x = 31,341.09 × 6,865.11
  4. Step 4: Simplify right side
    20,908.68x = 215,160,030.37
  5. Step 5: Solve for x
    x = 215,160,030.37/20,908.68
  6. Step 6: Final answer
    x = 10,290.46

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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.