Home / 20,803.06-31,209.74-8,319.75

Finding the Fourth Proportional to 20,803.06, 31,209.74 and 8,319.75

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Solution

The fourth proportional to 20,803.06, 31,209.74 and 8,319.75 is: 12,481.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.06 : 31,209.74 = 8,319.75 : x
  2. Step 2: Convert to fraction form
    20,803.06/31,209.74 = 8,319.75/x
  3. Step 3: Cross multiply
    20,803.06x = 31,209.74 × 8,319.75
  4. Step 4: Simplify right side
    20,803.06x = 259,657,106.93
  5. Step 5: Solve for x
    x = 259,657,106.93/20,803.06
  6. Step 6: Final answer
    x = 12,481.68

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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.