Home / 20,640.41-28,484.10-11,208.96

Finding the Fourth Proportional to 20,640.41, 28,484.10 and 11,208.96

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Solution

The fourth proportional to 20,640.41, 28,484.10 and 11,208.96 is: 15,468.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.41 : 28,484.10 = 11,208.96 : x
  2. Step 2: Convert to fraction form
    20,640.41/28,484.10 = 11,208.96/x
  3. Step 3: Cross multiply
    20,640.41x = 28,484.10 × 11,208.96
  4. Step 4: Simplify right side
    20,640.41x = 319,277,137.54
  5. Step 5: Solve for x
    x = 319,277,137.54/20,640.41
  6. Step 6: Final answer
    x = 15,468.55

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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.