Home / 20,279.87-30,420.28-6,952.75

Finding the Fourth Proportional to 20,279.87, 30,420.28 and 6,952.75

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Solution

The fourth proportional to 20,279.87, 30,420.28 and 6,952.75 is: 10,429.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.87 : 30,420.28 = 6,952.75 : x
  2. Step 2: Convert to fraction form
    20,279.87/30,420.28 = 6,952.75/x
  3. Step 3: Cross multiply
    20,279.87x = 30,420.28 × 6,952.75
  4. Step 4: Simplify right side
    20,279.87x = 211,504,666.42
  5. Step 5: Solve for x
    x = 211,504,666.42/20,279.87
  6. Step 6: Final answer
    x = 10,429.29

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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.