Home / 4,191.20-6,286.80-2,117.60

Finding the Fourth Proportional to 4,191.20, 6,286.80 and 2,117.60

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Solution

The fourth proportional to 4,191.20, 6,286.80 and 2,117.60 is: 3,176.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,191.20 : 6,286.80 = 2,117.60 : x
  2. Step 2: Convert to fraction form
    4,191.20/6,286.80 = 2,117.60/x
  3. Step 3: Cross multiply
    4,191.20x = 6,286.80 × 2,117.60
  4. Step 4: Simplify right side
    4,191.20x = 13,312,927.68
  5. Step 5: Solve for x
    x = 13,312,927.68/4,191.20
  6. Step 6: Final answer
    x = 3,176.40

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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.