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Finding the Fourth Proportional to 20,279.98, 30,420.81 and 6,962.12

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Solution

The fourth proportional to 20,279.98, 30,420.81 and 6,962.12 is: 10,443.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.98 : 30,420.81 = 6,962.12 : x
  2. Step 2: Convert to fraction form
    20,279.98/30,420.81 = 6,962.12/x
  3. Step 3: Cross multiply
    20,279.98x = 30,420.81 × 6,962.12
  4. Step 4: Simplify right side
    20,279.98x = 211,793,329.72
  5. Step 5: Solve for x
    x = 211,793,329.72/20,279.98
  6. Step 6: Final answer
    x = 10,443.47

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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.