Home / 33,318.80-45,987.72-21,990.32

Finding the Fourth Proportional to 33,318.80, 45,987.72 and 21,990.32

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Solution

The fourth proportional to 33,318.80, 45,987.72 and 21,990.32 is: 30,351.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,318.80 : 45,987.72 = 21,990.32 : x
  2. Step 2: Convert to fraction form
    33,318.80/45,987.72 = 21,990.32/x
  3. Step 3: Cross multiply
    33,318.80x = 45,987.72 × 21,990.32
  4. Step 4: Simplify right side
    33,318.80x = 1,011,284,678.87
  5. Step 5: Solve for x
    x = 1,011,284,678.87/33,318.80
  6. Step 6: Final answer
    x = 30,351.77

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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.