Home / 6,660.05-9,986.88-3,147.12

Finding the Fourth Proportional to 6,660.05, 9,986.88 and 3,147.12

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Solution

The fourth proportional to 6,660.05, 9,986.88 and 3,147.12 is: 4,719.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,660.05 : 9,986.88 = 3,147.12 : x
  2. Step 2: Convert to fraction form
    6,660.05/9,986.88 = 3,147.12/x
  3. Step 3: Cross multiply
    6,660.05x = 9,986.88 × 3,147.12
  4. Step 4: Simplify right side
    6,660.05x = 31,429,909.79
  5. Step 5: Solve for x
    x = 31,429,909.79/6,660.05
  6. Step 6: Final answer
    x = 4,719.17

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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.