Home / 20,390.73-28,138.77-11,192.16

Finding the Fourth Proportional to 20,390.73, 28,138.77 and 11,192.16

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Solution

The fourth proportional to 20,390.73, 28,138.77 and 11,192.16 is: 15,444.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,390.73 : 28,138.77 = 11,192.16 : x
  2. Step 2: Convert to fraction form
    20,390.73/28,138.77 = 11,192.16/x
  3. Step 3: Cross multiply
    20,390.73x = 28,138.77 × 11,192.16
  4. Step 4: Simplify right side
    20,390.73x = 314,933,616.04
  5. Step 5: Solve for x
    x = 314,933,616.04/20,390.73
  6. Step 6: Final answer
    x = 15,444.94

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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.