Home / 20,456.54-30,742.59-12,138.12

Finding the Fourth Proportional to 20,456.54, 30,742.59 and 12,138.12

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Solution

The fourth proportional to 20,456.54, 30,742.59 and 12,138.12 is: 18,241.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,456.54 : 30,742.59 = 12,138.12 : x
  2. Step 2: Convert to fraction form
    20,456.54/30,742.59 = 12,138.12/x
  3. Step 3: Cross multiply
    20,456.54x = 30,742.59 × 12,138.12
  4. Step 4: Simplify right side
    20,456.54x = 373,157,246.53
  5. Step 5: Solve for x
    x = 373,157,246.53/20,456.54
  6. Step 6: Final answer
    x = 18,241.46

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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.