Home / 20,388.48-30,591.36-11,143.68

Finding the Fourth Proportional to 20,388.48, 30,591.36 and 11,143.68

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Solution

The fourth proportional to 20,388.48, 30,591.36 and 11,143.68 is: 16,720.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.48 : 30,591.36 = 11,143.68 : x
  2. Step 2: Convert to fraction form
    20,388.48/30,591.36 = 11,143.68/x
  3. Step 3: Cross multiply
    20,388.48x = 30,591.36 × 11,143.68
  4. Step 4: Simplify right side
    20,388.48x = 340,900,326.60
  5. Step 5: Solve for x
    x = 340,900,326.60/20,388.48
  6. Step 6: Final answer
    x = 16,720.24

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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.