Home / 27,991.55-38,621.70-15,889.34

Finding the Fourth Proportional to 27,991.55, 38,621.70 and 15,889.34

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Solution

The fourth proportional to 27,991.55, 38,621.70 and 15,889.34 is: 21,923.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,991.55 : 38,621.70 = 15,889.34 : x
  2. Step 2: Convert to fraction form
    27,991.55/38,621.70 = 15,889.34/x
  3. Step 3: Cross multiply
    27,991.55x = 38,621.70 × 15,889.34
  4. Step 4: Simplify right side
    27,991.55x = 613,673,129.57
  5. Step 5: Solve for x
    x = 613,673,129.57/27,991.55
  6. Step 6: Final answer
    x = 21,923.52

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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.