Home / 20,802.88-28,708.07-11,371.44

Finding the Fourth Proportional to 20,802.88, 28,708.07 and 11,371.44

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Solution

The fourth proportional to 20,802.88, 28,708.07 and 11,371.44 is: 15,692.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.88 : 28,708.07 = 11,371.44 : x
  2. Step 2: Convert to fraction form
    20,802.88/28,708.07 = 11,371.44/x
  3. Step 3: Cross multiply
    20,802.88x = 28,708.07 × 11,371.44
  4. Step 4: Simplify right side
    20,802.88x = 326,452,048.80
  5. Step 5: Solve for x
    x = 326,452,048.80/20,802.88
  6. Step 6: Final answer
    x = 15,692.64

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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.