Home / 20,127.70-30,191.55-12,708.10

Finding the Fourth Proportional to 20,127.70, 30,191.55 and 12,708.10

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Solution

The fourth proportional to 20,127.70, 30,191.55 and 12,708.10 is: 19,062.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,127.70 : 30,191.55 = 12,708.10 : x
  2. Step 2: Convert to fraction form
    20,127.70/30,191.55 = 12,708.10/x
  3. Step 3: Cross multiply
    20,127.70x = 30,191.55 × 12,708.10
  4. Step 4: Simplify right side
    20,127.70x = 383,677,236.56
  5. Step 5: Solve for x
    x = 383,677,236.56/20,127.70
  6. Step 6: Final answer
    x = 19,062.15

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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.