Home / 20,876.88-31,240.80-18,135.84

Finding the Fourth Proportional to 20,876.88, 31,240.80 and 18,135.84

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Solution

The fourth proportional to 20,876.88, 31,240.80 and 18,135.84 is: 27,139.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.88 : 31,240.80 = 18,135.84 : x
  2. Step 2: Convert to fraction form
    20,876.88/31,240.80 = 18,135.84/x
  3. Step 3: Cross multiply
    20,876.88x = 31,240.80 × 18,135.84
  4. Step 4: Simplify right side
    20,876.88x = 566,578,150.27
  5. Step 5: Solve for x
    x = 566,578,150.27/20,876.88
  6. Step 6: Final answer
    x = 27,139.02

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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.