Home / 20,640.11-28,483.50-11,208.66

Finding the Fourth Proportional to 20,640.11, 28,483.50 and 11,208.66

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Solution

The fourth proportional to 20,640.11, 28,483.50 and 11,208.66 is: 15,468.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.11 : 28,483.50 = 11,208.66 : x
  2. Step 2: Convert to fraction form
    20,640.11/28,483.50 = 11,208.66/x
  3. Step 3: Cross multiply
    20,640.11x = 28,483.50 × 11,208.66
  4. Step 4: Simplify right side
    20,640.11x = 319,261,867.11
  5. Step 5: Solve for x
    x = 319,261,867.11/20,640.11
  6. Step 6: Final answer
    x = 15,468.04

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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.