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Finding the Fourth Proportional to 13,249.80, 18,280.80 and 11,008.13

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Solution

The fourth proportional to 13,249.80, 18,280.80 and 11,008.13 is: 15,187.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,249.80 : 18,280.80 = 11,008.13 : x
  2. Step 2: Convert to fraction form
    13,249.80/18,280.80 = 11,008.13/x
  3. Step 3: Cross multiply
    13,249.80x = 18,280.80 × 11,008.13
  4. Step 4: Simplify right side
    13,249.80x = 201,237,331.50
  5. Step 5: Solve for x
    x = 201,237,331.50/13,249.80
  6. Step 6: Final answer
    x = 15,187.95

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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.