Home / 20,936.40-28,891.72-11,983.32

Finding the Fourth Proportional to 20,936.40, 28,891.72 and 11,983.32

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Solution

The fourth proportional to 20,936.40, 28,891.72 and 11,983.32 is: 16,536.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.40 : 28,891.72 = 11,983.32 : x
  2. Step 2: Convert to fraction form
    20,936.40/28,891.72 = 11,983.32/x
  3. Step 3: Cross multiply
    20,936.40x = 28,891.72 × 11,983.32
  4. Step 4: Simplify right side
    20,936.40x = 346,218,726.11
  5. Step 5: Solve for x
    x = 346,218,726.11/20,936.40
  6. Step 6: Final answer
    x = 16,536.69

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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.