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Finding the Fourth Proportional to 14,129.55, 21,204.86 and 5,381.55

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Solution

The fourth proportional to 14,129.55, 21,204.86 and 5,381.55 is: 8,076.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,129.55 : 21,204.86 = 5,381.55 : x
  2. Step 2: Convert to fraction form
    14,129.55/21,204.86 = 5,381.55/x
  3. Step 3: Cross multiply
    14,129.55x = 21,204.86 × 5,381.55
  4. Step 4: Simplify right side
    14,129.55x = 114,114,987.43
  5. Step 5: Solve for x
    x = 114,114,987.43/14,129.55
  6. Step 6: Final answer
    x = 8,076.34

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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.