Home / 20,954.72-28,917.44-12,005.20

Finding the Fourth Proportional to 20,954.72, 28,917.44 and 12,005.20

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Solution

The fourth proportional to 20,954.72, 28,917.44 and 12,005.20 is: 16,567.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954.72 : 28,917.44 = 12,005.20 : x
  2. Step 2: Convert to fraction form
    20,954.72/28,917.44 = 12,005.20/x
  3. Step 3: Cross multiply
    20,954.72x = 28,917.44 × 12,005.20
  4. Step 4: Simplify right side
    20,954.72x = 347,159,650.69
  5. Step 5: Solve for x
    x = 347,159,650.69/20,954.72
  6. Step 6: Final answer
    x = 16,567.13

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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.