Home / 20,741.50-31,112.38-5,159.12

Finding the Fourth Proportional to 20,741.50, 31,112.38 and 5,159.12

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Solution

The fourth proportional to 20,741.50, 31,112.38 and 5,159.12 is: 7,738.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,741.50 : 31,112.38 = 5,159.12 : x
  2. Step 2: Convert to fraction form
    20,741.50/31,112.38 = 5,159.12/x
  3. Step 3: Cross multiply
    20,741.50x = 31,112.38 × 5,159.12
  4. Step 4: Simplify right side
    20,741.50x = 160,512,501.91
  5. Step 5: Solve for x
    x = 160,512,501.91/20,741.50
  6. Step 6: Final answer
    x = 7,738.71

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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.