Home / 20,835.54-28,759.08-11,887.92

Finding the Fourth Proportional to 20,835.54, 28,759.08 and 11,887.92

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Solution

The fourth proportional to 20,835.54, 28,759.08 and 11,887.92 is: 16,408.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.54 : 28,759.08 = 11,887.92 : x
  2. Step 2: Convert to fraction form
    20,835.54/28,759.08 = 11,887.92/x
  3. Step 3: Cross multiply
    20,835.54x = 28,759.08 × 11,887.92
  4. Step 4: Simplify right side
    20,835.54x = 341,885,642.31
  5. Step 5: Solve for x
    x = 341,885,642.31/20,835.54
  6. Step 6: Final answer
    x = 16,408.77

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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.