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Finding the Fourth Proportional to 20,793.90, 28,699.07 and 11,840.16

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Solution

The fourth proportional to 20,793.90, 28,699.07 and 11,840.16 is: 16,341.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,793.90 : 28,699.07 = 11,840.16 : x
  2. Step 2: Convert to fraction form
    20,793.90/28,699.07 = 11,840.16/x
  3. Step 3: Cross multiply
    20,793.90x = 28,699.07 × 11,840.16
  4. Step 4: Simplify right side
    20,793.90x = 339,801,580.65
  5. Step 5: Solve for x
    x = 339,801,580.65/20,793.90
  6. Step 6: Final answer
    x = 16,341.41

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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.