Home / 20,127.60-27,778.80-12,170.16

Finding the Fourth Proportional to 20,127.60, 27,778.80 and 12,170.16

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Solution

The fourth proportional to 20,127.60, 27,778.80 and 12,170.16 is: 16,796.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,127.60 : 27,778.80 = 12,170.16 : x
  2. Step 2: Convert to fraction form
    20,127.60/27,778.80 = 12,170.16/x
  3. Step 3: Cross multiply
    20,127.60x = 27,778.80 × 12,170.16
  4. Step 4: Simplify right side
    20,127.60x = 338,072,440.61
  5. Step 5: Solve for x
    x = 338,072,440.61/20,127.60
  6. Step 6: Final answer
    x = 16,796.46

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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.