Home / 7,428.15-11,153.79-6,399.68

Finding the Fourth Proportional to 7,428.15, 11,153.79 and 6,399.68

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Solution

The fourth proportional to 7,428.15, 11,153.79 and 6,399.68 is: 9,609.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,428.15 : 11,153.79 = 6,399.68 : x
  2. Step 2: Convert to fraction form
    7,428.15/11,153.79 = 6,399.68/x
  3. Step 3: Cross multiply
    7,428.15x = 11,153.79 × 6,399.68
  4. Step 4: Simplify right side
    7,428.15x = 71,380,631.02
  5. Step 5: Solve for x
    x = 71,380,631.02/7,428.15
  6. Step 6: Final answer
    x = 9,609.48

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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.