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Finding the Fourth Proportional to 13,927.68, 21,015.72 and 13,387.68

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Solution

The fourth proportional to 13,927.68, 21,015.72 and 13,387.68 is: 20,200.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,927.68 : 21,015.72 = 13,387.68 : x
  2. Step 2: Convert to fraction form
    13,927.68/21,015.72 = 13,387.68/x
  3. Step 3: Cross multiply
    13,927.68x = 21,015.72 × 13,387.68
  4. Step 4: Simplify right side
    13,927.68x = 281,351,734.33
  5. Step 5: Solve for x
    x = 281,351,734.33/13,927.68
  6. Step 6: Final answer
    x = 20,200.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.