Home / 20,749.32-28,640.16-11,801.79

Finding the Fourth Proportional to 20,749.32, 28,640.16 and 11,801.79

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Solution

The fourth proportional to 20,749.32, 28,640.16 and 11,801.79 is: 16,289.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.32 : 28,640.16 = 11,801.79 : x
  2. Step 2: Convert to fraction form
    20,749.32/28,640.16 = 11,801.79/x
  3. Step 3: Cross multiply
    20,749.32x = 28,640.16 × 11,801.79
  4. Step 4: Simplify right side
    20,749.32x = 338,005,153.89
  5. Step 5: Solve for x
    x = 338,005,153.89/20,749.32
  6. Step 6: Final answer
    x = 16,289.94

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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.