Home / 20,803.14-28,708.30-11,371.71

Finding the Fourth Proportional to 20,803.14, 28,708.30 and 11,371.71

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Solution

The fourth proportional to 20,803.14, 28,708.30 and 11,371.71 is: 15,692.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.14 : 28,708.30 = 11,371.71 : x
  2. Step 2: Convert to fraction form
    20,803.14/28,708.30 = 11,371.71/x
  3. Step 3: Cross multiply
    20,803.14x = 28,708.30 × 11,371.71
  4. Step 4: Simplify right side
    20,803.14x = 326,462,290.22
  5. Step 5: Solve for x
    x = 326,462,290.22/20,803.14
  6. Step 6: Final answer
    x = 15,692.93

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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.