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Finding the Fourth Proportional to 13,880.66, 20,822.11 and 4,520.51

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Solution

The fourth proportional to 13,880.66, 20,822.11 and 4,520.51 is: 6,781.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,880.66 : 20,822.11 = 4,520.51 : x
  2. Step 2: Convert to fraction form
    13,880.66/20,822.11 = 4,520.51/x
  3. Step 3: Cross multiply
    13,880.66x = 20,822.11 × 4,520.51
  4. Step 4: Simplify right side
    13,880.66x = 94,126,429.76
  5. Step 5: Solve for x
    x = 94,126,429.76/13,880.66
  6. Step 6: Final answer
    x = 6,781.12

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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.