Home / 20,115.24-30,189.45-10,122.81

Finding the Fourth Proportional to 20,115.24, 30,189.45 and 10,122.81

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Solution

The fourth proportional to 20,115.24, 30,189.45 and 10,122.81 is: 15,192.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.24 : 30,189.45 = 10,122.81 : x
  2. Step 2: Convert to fraction form
    20,115.24/30,189.45 = 10,122.81/x
  3. Step 3: Cross multiply
    20,115.24x = 30,189.45 × 10,122.81
  4. Step 4: Simplify right side
    20,115.24x = 305,602,066.35
  5. Step 5: Solve for x
    x = 305,602,066.35/20,115.24
  6. Step 6: Final answer
    x = 15,192.56

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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.