Home / 13,140.66-19,708.86-3,778.56

Finding the Fourth Proportional to 13,140.66, 19,708.86 and 3,778.56

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Solution

The fourth proportional to 13,140.66, 19,708.86 and 3,778.56 is: 5,667.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.66 : 19,708.86 = 3,778.56 : x
  2. Step 2: Convert to fraction form
    13,140.66/19,708.86 = 3,778.56/x
  3. Step 3: Cross multiply
    13,140.66x = 19,708.86 × 3,778.56
  4. Step 4: Simplify right side
    13,140.66x = 74,471,110.04
  5. Step 5: Solve for x
    x = 74,471,110.04/13,140.66
  6. Step 6: Final answer
    x = 5,667.23

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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.