Home / 13,240.80-18,269.28-8,205.12

Finding the Fourth Proportional to 13,240.80, 18,269.28 and 8,205.12

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Solution

The fourth proportional to 13,240.80, 18,269.28 and 8,205.12 is: 11,321.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,240.80 : 18,269.28 = 8,205.12 : x
  2. Step 2: Convert to fraction form
    13,240.80/18,269.28 = 8,205.12/x
  3. Step 3: Cross multiply
    13,240.80x = 18,269.28 × 8,205.12
  4. Step 4: Simplify right side
    13,240.80x = 149,901,634.71
  5. Step 5: Solve for x
    x = 149,901,634.71/13,240.80
  6. Step 6: Final answer
    x = 11,321.19

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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.