Home / 5,111.60-7,667.92-1,991.92

Finding the Fourth Proportional to 5,111.60, 7,667.92 and 1,991.92

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Solution

The fourth proportional to 5,111.60, 7,667.92 and 1,991.92 is: 2,988.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,111.60 : 7,667.92 = 1,991.92 : x
  2. Step 2: Convert to fraction form
    5,111.60/7,667.92 = 1,991.92/x
  3. Step 3: Cross multiply
    5,111.60x = 7,667.92 × 1,991.92
  4. Step 4: Simplify right side
    5,111.60x = 15,273,883.21
  5. Step 5: Solve for x
    x = 15,273,883.21/5,111.60
  6. Step 6: Final answer
    x = 2,988.08

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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.