Home / 20,088.20-30,146.70-11,313.80

Finding the Fourth Proportional to 20,088.20, 30,146.70 and 11,313.80

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Solution

The fourth proportional to 20,088.20, 30,146.70 and 11,313.80 is: 16,978.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,088.20 : 30,146.70 = 11,313.80 : x
  2. Step 2: Convert to fraction form
    20,088.20/30,146.70 = 11,313.80/x
  3. Step 3: Cross multiply
    20,088.20x = 30,146.70 × 11,313.80
  4. Step 4: Simplify right side
    20,088.20x = 341,073,734.46
  5. Step 5: Solve for x
    x = 341,073,734.46/20,088.20
  6. Step 6: Final answer
    x = 16,978.81

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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.