Home / 6,921.20-10,380.72-2,536.40

Finding the Fourth Proportional to 6,921.20, 10,380.72 and 2,536.40

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Solution

The fourth proportional to 6,921.20, 10,380.72 and 2,536.40 is: 3,804.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.20 : 10,380.72 = 2,536.40 : x
  2. Step 2: Convert to fraction form
    6,921.20/10,380.72 = 2,536.40/x
  3. Step 3: Cross multiply
    6,921.20x = 10,380.72 × 2,536.40
  4. Step 4: Simplify right side
    6,921.20x = 26,329,658.21
  5. Step 5: Solve for x
    x = 26,329,658.21/6,921.20
  6. Step 6: Final answer
    x = 3,804.20

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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.