Home / 20,651.20-28,498.66-11,219.77

Finding the Fourth Proportional to 20,651.20, 28,498.66 and 11,219.77

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Solution

The fourth proportional to 20,651.20, 28,498.66 and 11,219.77 is: 15,483.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.20 : 28,498.66 = 11,219.77 : x
  2. Step 2: Convert to fraction form
    20,651.20/28,498.66 = 11,219.77/x
  3. Step 3: Cross multiply
    20,651.20x = 28,498.66 × 11,219.77
  4. Step 4: Simplify right side
    20,651.20x = 319,748,289.33
  5. Step 5: Solve for x
    x = 319,748,289.33/20,651.20
  6. Step 6: Final answer
    x = 15,483.28

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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.