Home / 20,651.82-28,499.76-11,220.48

Finding the Fourth Proportional to 20,651.82, 28,499.76 and 11,220.48

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Solution

The fourth proportional to 20,651.82, 28,499.76 and 11,220.48 is: 15,484.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.82 : 28,499.76 = 11,220.48 : x
  2. Step 2: Convert to fraction form
    20,651.82/28,499.76 = 11,220.48/x
  3. Step 3: Cross multiply
    20,651.82x = 28,499.76 × 11,220.48
  4. Step 4: Simplify right side
    20,651.82x = 319,780,987.08
  5. Step 5: Solve for x
    x = 319,780,987.08/20,651.82
  6. Step 6: Final answer
    x = 15,484.40

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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.