Home / 20,651.36-28,498.74-11,219.92

Finding the Fourth Proportional to 20,651.36, 28,498.74 and 11,219.92

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Solution

The fourth proportional to 20,651.36, 28,498.74 and 11,219.92 is: 15,483.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.36 : 28,498.74 = 11,219.92 : x
  2. Step 2: Convert to fraction form
    20,651.36/28,498.74 = 11,219.92/x
  3. Step 3: Cross multiply
    20,651.36x = 28,498.74 × 11,219.92
  4. Step 4: Simplify right side
    20,651.36x = 319,753,469.58
  5. Step 5: Solve for x
    x = 319,753,469.58/20,651.36
  6. Step 6: Final answer
    x = 15,483.41

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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.