Home / 20,112.13-27,750.67-12,154.78

Finding the Fourth Proportional to 20,112.13, 27,750.67 and 12,154.78

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Solution

The fourth proportional to 20,112.13, 27,750.67 and 12,154.78 is: 16,771.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,112.13 : 27,750.67 = 12,154.78 : x
  2. Step 2: Convert to fraction form
    20,112.13/27,750.67 = 12,154.78/x
  3. Step 3: Cross multiply
    20,112.13x = 27,750.67 × 12,154.78
  4. Step 4: Simplify right side
    20,112.13x = 337,303,288.70
  5. Step 5: Solve for x
    x = 337,303,288.70/20,112.13
  6. Step 6: Final answer
    x = 16,771.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.