Home / 20,648.64-28,495.68-11,217.84

Finding the Fourth Proportional to 20,648.64, 28,495.68 and 11,217.84

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Solution

The fourth proportional to 20,648.64, 28,495.68 and 11,217.84 is: 15,480.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.64 : 28,495.68 = 11,217.84 : x
  2. Step 2: Convert to fraction form
    20,648.64/28,495.68 = 11,217.84/x
  3. Step 3: Cross multiply
    20,648.64x = 28,495.68 × 11,217.84
  4. Step 4: Simplify right side
    20,648.64x = 319,659,978.93
  5. Step 5: Solve for x
    x = 319,659,978.93/20,648.64
  6. Step 6: Final answer
    x = 15,480.92

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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.