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Finding the Fourth Proportional to 55,425.88, 83,138.86 and 13,872.84

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Solution

The fourth proportional to 55,425.88, 83,138.86 and 13,872.84 is: 20,809.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,425.88 : 83,138.86 = 13,872.84 : x
  2. Step 2: Convert to fraction form
    55,425.88/83,138.86 = 13,872.84/x
  3. Step 3: Cross multiply
    55,425.88x = 83,138.86 × 13,872.84
  4. Step 4: Simplify right side
    55,425.88x = 1,153,372,102.56
  5. Step 5: Solve for x
    x = 1,153,372,102.56/55,425.88
  6. Step 6: Final answer
    x = 20,809.27

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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.