Home / 7,459.68-11,178.63-6,639.60

Finding the Fourth Proportional to 7,459.68, 11,178.63 and 6,639.60

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Solution

The fourth proportional to 7,459.68, 11,178.63 and 6,639.60 is: 9,949.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,459.68 : 11,178.63 = 6,639.60 : x
  2. Step 2: Convert to fraction form
    7,459.68/11,178.63 = 6,639.60/x
  3. Step 3: Cross multiply
    7,459.68x = 11,178.63 × 6,639.60
  4. Step 4: Simplify right side
    7,459.68x = 74,221,631.75
  5. Step 5: Solve for x
    x = 74,221,631.75/7,459.68
  6. Step 6: Final answer
    x = 9,949.71

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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.