Home / 20,927.20-28,884.73-11,979.81

Finding the Fourth Proportional to 20,927.20, 28,884.73 and 11,979.81

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Solution

The fourth proportional to 20,927.20, 28,884.73 and 11,979.81 is: 16,535.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,927.20 : 28,884.73 = 11,979.81 : x
  2. Step 2: Convert to fraction form
    20,927.20/28,884.73 = 11,979.81/x
  3. Step 3: Cross multiply
    20,927.20x = 28,884.73 × 11,979.81
  4. Step 4: Simplify right side
    20,927.20x = 346,033,577.30
  5. Step 5: Solve for x
    x = 346,033,577.30/20,927.20
  6. Step 6: Final answer
    x = 16,535.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.