Home / 20,139.40-27,910.12-19,857.52

Finding the Fourth Proportional to 20,139.40, 27,910.12 and 19,857.52

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Solution

The fourth proportional to 20,139.40, 27,910.12 and 19,857.52 is: 27,519.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.40 : 27,910.12 = 19,857.52 : x
  2. Step 2: Convert to fraction form
    20,139.40/27,910.12 = 19,857.52/x
  3. Step 3: Cross multiply
    20,139.40x = 27,910.12 × 19,857.52
  4. Step 4: Simplify right side
    20,139.40x = 554,225,766.10
  5. Step 5: Solve for x
    x = 554,225,766.10/20,139.40
  6. Step 6: Final answer
    x = 27,519.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.