Home / 21,179.88-31,808.70-18,555.48

Finding the Fourth Proportional to 21,179.88, 31,808.70 and 18,555.48

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Solution

The fourth proportional to 21,179.88, 31,808.70 and 18,555.48 is: 27,867.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.88 : 31,808.70 = 18,555.48 : x
  2. Step 2: Convert to fraction form
    21,179.88/31,808.70 = 18,555.48/x
  3. Step 3: Cross multiply
    21,179.88x = 31,808.70 × 18,555.48
  4. Step 4: Simplify right side
    21,179.88x = 590,225,696.68
  5. Step 5: Solve for x
    x = 590,225,696.68/21,179.88
  6. Step 6: Final answer
    x = 27,867.28

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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.