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Finding the Fourth Proportional to 13,803.20, 20,680.40 and 13,346.40

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Solution

The fourth proportional to 13,803.20, 20,680.40 and 13,346.40 is: 19,996.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,803.20 : 20,680.40 = 13,346.40 : x
  2. Step 2: Convert to fraction form
    13,803.20/20,680.40 = 13,346.40/x
  3. Step 3: Cross multiply
    13,803.20x = 20,680.40 × 13,346.40
  4. Step 4: Simplify right side
    13,803.20x = 276,008,890.56
  5. Step 5: Solve for x
    x = 276,008,890.56/13,803.20
  6. Step 6: Final answer
    x = 19,996.01

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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.