Home / 20,742.74-31,114.22-5,160.36

Finding the Fourth Proportional to 20,742.74, 31,114.22 and 5,160.36

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Solution

The fourth proportional to 20,742.74, 31,114.22 and 5,160.36 is: 7,740.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.74 : 31,114.22 = 5,160.36 : x
  2. Step 2: Convert to fraction form
    20,742.74/31,114.22 = 5,160.36/x
  3. Step 3: Cross multiply
    20,742.74x = 31,114.22 × 5,160.36
  4. Step 4: Simplify right side
    20,742.74x = 160,560,576.32
  5. Step 5: Solve for x
    x = 160,560,576.32/20,742.74
  6. Step 6: Final answer
    x = 7,740.57

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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.