Home / 20,245.29-27,938.32-11,170.74

Finding the Fourth Proportional to 20,245.29, 27,938.32 and 11,170.74

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Solution

The fourth proportional to 20,245.29, 27,938.32 and 11,170.74 is: 15,415.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,245.29 : 27,938.32 = 11,170.74 : x
  2. Step 2: Convert to fraction form
    20,245.29/27,938.32 = 11,170.74/x
  3. Step 3: Cross multiply
    20,245.29x = 27,938.32 × 11,170.74
  4. Step 4: Simplify right side
    20,245.29x = 312,091,607.50
  5. Step 5: Solve for x
    x = 312,091,607.50/20,245.29
  6. Step 6: Final answer
    x = 15,415.51

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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.