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Finding the Fourth Proportional to 13,797.42, 20,696.79 and 3,938.13

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Solution

The fourth proportional to 13,797.42, 20,696.79 and 3,938.13 is: 5,907.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,797.42 : 20,696.79 = 3,938.13 : x
  2. Step 2: Convert to fraction form
    13,797.42/20,696.79 = 3,938.13/x
  3. Step 3: Cross multiply
    13,797.42x = 20,696.79 × 3,938.13
  4. Step 4: Simplify right side
    13,797.42x = 81,506,649.60
  5. Step 5: Solve for x
    x = 81,506,649.60/13,797.42
  6. Step 6: Final answer
    x = 5,907.38

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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.