Home / 13,520.61-18,661.77-8,218.95

Finding the Fourth Proportional to 13,520.61, 18,661.77 and 8,218.95

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Solution

The fourth proportional to 13,520.61, 18,661.77 and 8,218.95 is: 11,344.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,520.61 : 18,661.77 = 8,218.95 : x
  2. Step 2: Convert to fraction form
    13,520.61/18,661.77 = 8,218.95/x
  3. Step 3: Cross multiply
    13,520.61x = 18,661.77 × 8,218.95
  4. Step 4: Simplify right side
    13,520.61x = 153,380,154.54
  5. Step 5: Solve for x
    x = 153,380,154.54/13,520.61
  6. Step 6: Final answer
    x = 11,344.17

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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.