Home / 39,900.87-55,063.56-21,996.51

Finding the Fourth Proportional to 39,900.87, 55,063.56 and 21,996.51

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Solution

The fourth proportional to 39,900.87, 55,063.56 and 21,996.51 is: 30,355.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,900.87 : 55,063.56 = 21,996.51 : x
  2. Step 2: Convert to fraction form
    39,900.87/55,063.56 = 21,996.51/x
  3. Step 3: Cross multiply
    39,900.87x = 55,063.56 × 21,996.51
  4. Step 4: Simplify right side
    39,900.87x = 1,211,206,148.18
  5. Step 5: Solve for x
    x = 1,211,206,148.18/39,900.87
  6. Step 6: Final answer
    x = 30,355.38

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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.