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Finding the Fourth Proportional to 13,599.71, 20,399.79 and 3,738.93

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Solution

The fourth proportional to 13,599.71, 20,399.79 and 3,738.93 is: 5,608.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,599.71 : 20,399.79 = 3,738.93 : x
  2. Step 2: Convert to fraction form
    13,599.71/20,399.79 = 3,738.93/x
  3. Step 3: Cross multiply
    13,599.71x = 20,399.79 × 3,738.93
  4. Step 4: Simplify right side
    13,599.71x = 76,273,386.82
  5. Step 5: Solve for x
    x = 76,273,386.82/13,599.71
  6. Step 6: Final answer
    x = 5,608.46

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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.