Home / 20,651.20-28,498.24-11,220

Finding the Fourth Proportional to 20,651.20, 28,498.24 and 11,220

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Solution

The fourth proportional to 20,651.20, 28,498.24 and 11,220 is: 15,483.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.20 : 28,498.24 = 11,220 : x
  2. Step 2: Convert to fraction form
    20,651.20/28,498.24 = 11,220/x
  3. Step 3: Cross multiply
    20,651.20x = 28,498.24 × 11,220
  4. Step 4: Simplify right side
    20,651.20x = 319,750,252.80
  5. Step 5: Solve for x
    x = 319,750,252.80/20,651.20
  6. Step 6: Final answer
    x = 15,483.37

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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.