Home / 20,270.89-27,969.69-12,308.77

Finding the Fourth Proportional to 20,270.89, 27,969.69 and 12,308.77

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Solution

The fourth proportional to 20,270.89, 27,969.69 and 12,308.77 is: 16,983.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,270.89 : 27,969.69 = 12,308.77 : x
  2. Step 2: Convert to fraction form
    20,270.89/27,969.69 = 12,308.77/x
  3. Step 3: Cross multiply
    20,270.89x = 27,969.69 × 12,308.77
  4. Step 4: Simplify right side
    20,270.89x = 344,272,481.18
  5. Step 5: Solve for x
    x = 344,272,481.18/20,270.89
  6. Step 6: Final answer
    x = 16,983.59

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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.