Home / 20,131.36-30,199.48-5,340.56

Finding the Fourth Proportional to 20,131.36, 30,199.48 and 5,340.56

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Solution

The fourth proportional to 20,131.36, 30,199.48 and 5,340.56 is: 8,011.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.36 : 30,199.48 = 5,340.56 : x
  2. Step 2: Convert to fraction form
    20,131.36/30,199.48 = 5,340.56/x
  3. Step 3: Cross multiply
    20,131.36x = 30,199.48 × 5,340.56
  4. Step 4: Simplify right side
    20,131.36x = 161,281,970.56
  5. Step 5: Solve for x
    x = 161,281,970.56/20,131.36
  6. Step 6: Final answer
    x = 8,011.48

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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.