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Finding the Fourth Proportional to 13,797.40, 20,696.80 and 3,938.12

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Solution

The fourth proportional to 13,797.40, 20,696.80 and 3,938.12 is: 5,907.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,797.40 : 20,696.80 = 3,938.12 : x
  2. Step 2: Convert to fraction form
    13,797.40/20,696.80 = 3,938.12/x
  3. Step 3: Cross multiply
    13,797.40x = 20,696.80 × 3,938.12
  4. Step 4: Simplify right side
    13,797.40x = 81,506,482.02
  5. Step 5: Solve for x
    x = 81,506,482.02/13,797.40
  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.