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Finding the Fourth Proportional to 13,818.66, 20,740.01 and 7,249.47

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Solution

The fourth proportional to 13,818.66, 20,740.01 and 7,249.47 is: 10,880.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,818.66 : 20,740.01 = 7,249.47 : x
  2. Step 2: Convert to fraction form
    13,818.66/20,740.01 = 7,249.47/x
  3. Step 3: Cross multiply
    13,818.66x = 20,740.01 × 7,249.47
  4. Step 4: Simplify right side
    13,818.66x = 150,354,080.29
  5. Step 5: Solve for x
    x = 150,354,080.29/13,818.66
  6. Step 6: Final answer
    x = 10,880.51

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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.