Home / 21,945.16-30,288.90-20,173.96

Finding the Fourth Proportional to 21,945.16, 30,288.90 and 20,173.96

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Solution

The fourth proportional to 21,945.16, 30,288.90 and 20,173.96 is: 27,844.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,945.16 : 30,288.90 = 20,173.96 : x
  2. Step 2: Convert to fraction form
    21,945.16/30,288.90 = 20,173.96/x
  3. Step 3: Cross multiply
    21,945.16x = 30,288.90 × 20,173.96
  4. Step 4: Simplify right side
    21,945.16x = 611,047,057.04
  5. Step 5: Solve for x
    x = 611,047,057.04/21,945.16
  6. Step 6: Final answer
    x = 27,844.27

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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.