Home / 27,991.05-38,621.01-15,888.84

Finding the Fourth Proportional to 27,991.05, 38,621.01 and 15,888.84

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Solution

The fourth proportional to 27,991.05, 38,621.01 and 15,888.84 is: 21,922.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,991.05 : 38,621.01 = 15,888.84 : x
  2. Step 2: Convert to fraction form
    27,991.05/38,621.01 = 15,888.84/x
  3. Step 3: Cross multiply
    27,991.05x = 38,621.01 × 15,888.84
  4. Step 4: Simplify right side
    27,991.05x = 613,643,048.53
  5. Step 5: Solve for x
    x = 613,643,048.53/27,991.05
  6. Step 6: Final answer
    x = 21,922.83

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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.