Home / 20,780.22-31,175.24-6,740.25

Finding the Fourth Proportional to 20,780.22, 31,175.24 and 6,740.25

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Solution

The fourth proportional to 20,780.22, 31,175.24 and 6,740.25 is: 10,111.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.22 : 31,175.24 = 6,740.25 : x
  2. Step 2: Convert to fraction form
    20,780.22/31,175.24 = 6,740.25/x
  3. Step 3: Cross multiply
    20,780.22x = 31,175.24 × 6,740.25
  4. Step 4: Simplify right side
    20,780.22x = 210,128,911.41
  5. Step 5: Solve for x
    x = 210,128,911.41/20,780.22
  6. Step 6: Final answer
    x = 10,111.97

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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.