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Finding the Fourth Proportional to 13,620.78, 18,798.04 and 9,153.84

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Solution

The fourth proportional to 13,620.78, 18,798.04 and 9,153.84 is: 12,633.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.78 : 18,798.04 = 9,153.84 : x
  2. Step 2: Convert to fraction form
    13,620.78/18,798.04 = 9,153.84/x
  3. Step 3: Cross multiply
    13,620.78x = 18,798.04 × 9,153.84
  4. Step 4: Simplify right side
    13,620.78x = 172,074,250.47
  5. Step 5: Solve for x
    x = 172,074,250.47/13,620.78
  6. Step 6: Final answer
    x = 12,633.22

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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.