Home / 6,991.20-10,478.16-4,209.12

Finding the Fourth Proportional to 6,991.20, 10,478.16 and 4,209.12

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Solution

The fourth proportional to 6,991.20, 10,478.16 and 4,209.12 is: 6,308.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.20 : 10,478.16 = 4,209.12 : x
  2. Step 2: Convert to fraction form
    6,991.20/10,478.16 = 4,209.12/x
  3. Step 3: Cross multiply
    6,991.20x = 10,478.16 × 4,209.12
  4. Step 4: Simplify right side
    6,991.20x = 44,103,832.82
  5. Step 5: Solve for x
    x = 44,103,832.82/6,991.20
  6. Step 6: Final answer
    x = 6,308.48

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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.