Home / 20,661.60-28,513.22-11,230.16

Finding the Fourth Proportional to 20,661.60, 28,513.22 and 11,230.16

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Solution

The fourth proportional to 20,661.60, 28,513.22 and 11,230.16 is: 15,497.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.60 : 28,513.22 = 11,230.16 : x
  2. Step 2: Convert to fraction form
    20,661.60/28,513.22 = 11,230.16/x
  3. Step 3: Cross multiply
    20,661.60x = 28,513.22 × 11,230.16
  4. Step 4: Simplify right side
    20,661.60x = 320,207,824.00
  5. Step 5: Solve for x
    x = 320,207,824.00/20,661.60
  6. Step 6: Final answer
    x = 15,497.73

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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.