Home / 18,139.80-27,165.96-12,278.64

Finding the Fourth Proportional to 18,139.80, 27,165.96 and 12,278.64

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Solution

The fourth proportional to 18,139.80, 27,165.96 and 12,278.64 is: 18,388.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.80 : 27,165.96 = 12,278.64 : x
  2. Step 2: Convert to fraction form
    18,139.80/27,165.96 = 12,278.64/x
  3. Step 3: Cross multiply
    18,139.80x = 27,165.96 × 12,278.64
  4. Step 4: Simplify right side
    18,139.80x = 333,561,043.09
  5. Step 5: Solve for x
    x = 333,561,043.09/18,139.80
  6. Step 6: Final answer
    x = 18,388.35

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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.