Home / 31,621.74-43,647.12-20,874.48

Finding the Fourth Proportional to 31,621.74, 43,647.12 and 20,874.48

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Solution

The fourth proportional to 31,621.74, 43,647.12 and 20,874.48 is: 28,812.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,621.74 : 43,647.12 = 20,874.48 : x
  2. Step 2: Convert to fraction form
    31,621.74/43,647.12 = 20,874.48/x
  3. Step 3: Cross multiply
    31,621.74x = 43,647.12 × 20,874.48
  4. Step 4: Simplify right side
    31,621.74x = 911,110,933.50
  5. Step 5: Solve for x
    x = 911,110,933.50/31,621.74
  6. Step 6: Final answer
    x = 28,812.80

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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.