Home / 20,939.28-31,404.74-10,261.05

Finding the Fourth Proportional to 20,939.28, 31,404.74 and 10,261.05

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Solution

The fourth proportional to 20,939.28, 31,404.74 and 10,261.05 is: 15,389.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.28 : 31,404.74 = 10,261.05 : x
  2. Step 2: Convert to fraction form
    20,939.28/31,404.74 = 10,261.05/x
  3. Step 3: Cross multiply
    20,939.28x = 31,404.74 × 10,261.05
  4. Step 4: Simplify right side
    20,939.28x = 322,245,556.07
  5. Step 5: Solve for x
    x = 322,245,556.07/20,939.28
  6. Step 6: Final answer
    x = 15,389.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.