Home / 20,440.77-28,205.12-11,486.54

Finding the Fourth Proportional to 20,440.77, 28,205.12 and 11,486.54

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Solution

The fourth proportional to 20,440.77, 28,205.12 and 11,486.54 is: 15,849.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.77 : 28,205.12 = 11,486.54 : x
  2. Step 2: Convert to fraction form
    20,440.77/28,205.12 = 11,486.54/x
  3. Step 3: Cross multiply
    20,440.77x = 28,205.12 × 11,486.54
  4. Step 4: Simplify right side
    20,440.77x = 323,979,040.63
  5. Step 5: Solve for x
    x = 323,979,040.63/20,440.77
  6. Step 6: Final answer
    x = 15,849.65

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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.