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Finding the Fourth Proportional to 20,126.71, 30,203.88 and 6,979.11

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Solution

The fourth proportional to 20,126.71, 30,203.88 and 6,979.11 is: 10,473.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,126.71 : 30,203.88 = 6,979.11 : x
  2. Step 2: Convert to fraction form
    20,126.71/30,203.88 = 6,979.11/x
  3. Step 3: Cross multiply
    20,126.71x = 30,203.88 × 6,979.11
  4. Step 4: Simplify right side
    20,126.71x = 210,796,200.95
  5. Step 5: Solve for x
    x = 210,796,200.95/20,126.71
  6. Step 6: Final answer
    x = 10,473.46

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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.