Home / 13,781.09-20,645.62-8,141.93

Finding the Fourth Proportional to 13,781.09, 20,645.62 and 8,141.93

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Solution

The fourth proportional to 13,781.09, 20,645.62 and 8,141.93 is: 12,197.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.09 : 20,645.62 = 8,141.93 : x
  2. Step 2: Convert to fraction form
    13,781.09/20,645.62 = 8,141.93/x
  3. Step 3: Cross multiply
    13,781.09x = 20,645.62 × 8,141.93
  4. Step 4: Simplify right side
    13,781.09x = 168,095,275.39
  5. Step 5: Solve for x
    x = 168,095,275.39/13,781.09
  6. Step 6: Final answer
    x = 12,197.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.