Home / 20,640.72-28,483.92-11,209.32

Finding the Fourth Proportional to 20,640.72, 28,483.92 and 11,209.32

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Solution

The fourth proportional to 20,640.72, 28,483.92 and 11,209.32 is: 15,468.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.72 : 28,483.92 = 11,209.32 : x
  2. Step 2: Convert to fraction form
    20,640.72/28,483.92 = 11,209.32/x
  3. Step 3: Cross multiply
    20,640.72x = 28,483.92 × 11,209.32
  4. Step 4: Simplify right side
    20,640.72x = 319,285,374.13
  5. Step 5: Solve for x
    x = 319,285,374.13/20,640.72
  6. Step 6: Final answer
    x = 15,468.71

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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.