Home / 20,987.39-31,483.38-6,942.29

Finding the Fourth Proportional to 20,987.39, 31,483.38 and 6,942.29

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Solution

The fourth proportional to 20,987.39, 31,483.38 and 6,942.29 is: 10,414.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.39 : 31,483.38 = 6,942.29 : x
  2. Step 2: Convert to fraction form
    20,987.39/31,483.38 = 6,942.29/x
  3. Step 3: Cross multiply
    20,987.39x = 31,483.38 × 6,942.29
  4. Step 4: Simplify right side
    20,987.39x = 218,566,858.88
  5. Step 5: Solve for x
    x = 218,566,858.88/20,987.39
  6. Step 6: Final answer
    x = 10,414.20

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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.