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Finding the Fourth Proportional to 13,639.12, 18,822.18 and 8,050.12

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Solution

The fourth proportional to 13,639.12, 18,822.18 and 8,050.12 is: 11,109.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.12 : 18,822.18 = 8,050.12 : x
  2. Step 2: Convert to fraction form
    13,639.12/18,822.18 = 8,050.12/x
  3. Step 3: Cross multiply
    13,639.12x = 18,822.18 × 8,050.12
  4. Step 4: Simplify right side
    13,639.12x = 151,520,807.66
  5. Step 5: Solve for x
    x = 151,520,807.66/13,639.12
  6. Step 6: Final answer
    x = 11,109.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.