Home / 20,648.32-28,493.72-11,695.90

Finding the Fourth Proportional to 20,648.32, 28,493.72 and 11,695.90

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Solution

The fourth proportional to 20,648.32, 28,493.72 and 11,695.90 is: 16,139.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.32 : 28,493.72 = 11,695.90 : x
  2. Step 2: Convert to fraction form
    20,648.32/28,493.72 = 11,695.90/x
  3. Step 3: Cross multiply
    20,648.32x = 28,493.72 × 11,695.90
  4. Step 4: Simplify right side
    20,648.32x = 333,259,699.75
  5. Step 5: Solve for x
    x = 333,259,699.75/20,648.32
  6. Step 6: Final answer
    x = 16,139.80

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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.