Home / 20,906.15-31,364.69-12,132.63

Finding the Fourth Proportional to 20,906.15, 31,364.69 and 12,132.63

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Solution

The fourth proportional to 20,906.15, 31,364.69 and 12,132.63 is: 18,202.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,906.15 : 31,364.69 = 12,132.63 : x
  2. Step 2: Convert to fraction form
    20,906.15/31,364.69 = 12,132.63/x
  3. Step 3: Cross multiply
    20,906.15x = 31,364.69 × 12,132.63
  4. Step 4: Simplify right side
    20,906.15x = 380,536,118.17
  5. Step 5: Solve for x
    x = 380,536,118.17/20,906.15
  6. Step 6: Final answer
    x = 18,202.12

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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.