Home / 20,278.40-27,983.89-11,326.02

Finding the Fourth Proportional to 20,278.40, 27,983.89 and 11,326.02

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Solution

The fourth proportional to 20,278.40, 27,983.89 and 11,326.02 is: 15,629.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.40 : 27,983.89 = 11,326.02 : x
  2. Step 2: Convert to fraction form
    20,278.40/27,983.89 = 11,326.02/x
  3. Step 3: Cross multiply
    20,278.40x = 27,983.89 × 11,326.02
  4. Step 4: Simplify right side
    20,278.40x = 316,946,188.60
  5. Step 5: Solve for x
    x = 316,946,188.60/20,278.40
  6. Step 6: Final answer
    x = 15,629.75

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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.