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Finding the Fourth Proportional to 14,107.55, 21,149.78 and 7,079.09

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Solution

The fourth proportional to 14,107.55, 21,149.78 and 7,079.09 is: 10,612.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,107.55 : 21,149.78 = 7,079.09 : x
  2. Step 2: Convert to fraction form
    14,107.55/21,149.78 = 7,079.09/x
  3. Step 3: Cross multiply
    14,107.55x = 21,149.78 × 7,079.09
  4. Step 4: Simplify right side
    14,107.55x = 149,721,054.96
  5. Step 5: Solve for x
    x = 149,721,054.96/14,107.55
  6. Step 6: Final answer
    x = 10,612.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.