Home / 5,518.75-8,278.19-2,187.81

Finding the Fourth Proportional to 5,518.75, 8,278.19 and 2,187.81

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Solution

The fourth proportional to 5,518.75, 8,278.19 and 2,187.81 is: 3,281.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,518.75 : 8,278.19 = 2,187.81 : x
  2. Step 2: Convert to fraction form
    5,518.75/8,278.19 = 2,187.81/x
  3. Step 3: Cross multiply
    5,518.75x = 8,278.19 × 2,187.81
  4. Step 4: Simplify right side
    5,518.75x = 18,111,106.86
  5. Step 5: Solve for x
    x = 18,111,106.86/5,518.75
  6. Step 6: Final answer
    x = 3,281.74

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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.