Home / 7,681.92-11,533.56-3,986.88

Finding the Fourth Proportional to 7,681.92, 11,533.56 and 3,986.88

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Solution

The fourth proportional to 7,681.92, 11,533.56 and 3,986.88 is: 5,985.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,681.92 : 11,533.56 = 3,986.88 : x
  2. Step 2: Convert to fraction form
    7,681.92/11,533.56 = 3,986.88/x
  3. Step 3: Cross multiply
    7,681.92x = 11,533.56 × 3,986.88
  4. Step 4: Simplify right side
    7,681.92x = 45,982,919.69
  5. Step 5: Solve for x
    x = 45,982,919.69/7,681.92
  6. Step 6: Final answer
    x = 5,985.86

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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.