Home / 19,638.12-27,086.79-12,921.60

Finding the Fourth Proportional to 19,638.12, 27,086.79 and 12,921.60

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Solution

The fourth proportional to 19,638.12, 27,086.79 and 12,921.60 is: 17,822.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,638.12 : 27,086.79 = 12,921.60 : x
  2. Step 2: Convert to fraction form
    19,638.12/27,086.79 = 12,921.60/x
  3. Step 3: Cross multiply
    19,638.12x = 27,086.79 × 12,921.60
  4. Step 4: Simplify right side
    19,638.12x = 350,004,665.66
  5. Step 5: Solve for x
    x = 350,004,665.66/19,638.12
  6. Step 6: Final answer
    x = 17,822.72

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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.