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Finding the Fourth Proportional to 13,620.77, 18,798.02 and 9,153.82

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Solution

The fourth proportional to 13,620.77, 18,798.02 and 9,153.82 is: 12,633.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.77 : 18,798.02 = 9,153.82 : x
  2. Step 2: Convert to fraction form
    13,620.77/18,798.02 = 9,153.82/x
  3. Step 3: Cross multiply
    13,620.77x = 18,798.02 × 9,153.82
  4. Step 4: Simplify right side
    13,620.77x = 172,073,691.44
  5. Step 5: Solve for x
    x = 172,073,691.44/13,620.77
  6. Step 6: Final answer
    x = 12,633.18

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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.