Home / 31,297.68-43,192.80-20,668.68

Finding the Fourth Proportional to 31,297.68, 43,192.80 and 20,668.68

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Solution

The fourth proportional to 31,297.68, 43,192.80 and 20,668.68 is: 28,524.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,297.68 : 43,192.80 = 20,668.68 : x
  2. Step 2: Convert to fraction form
    31,297.68/43,192.80 = 20,668.68/x
  3. Step 3: Cross multiply
    31,297.68x = 43,192.80 × 20,668.68
  4. Step 4: Simplify right side
    31,297.68x = 892,738,161.50
  5. Step 5: Solve for x
    x = 892,738,161.50/31,297.68
  6. Step 6: Final answer
    x = 28,524.10

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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.