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Finding the Fourth Proportional to 13,963.86, 20,887.20 and 12,914.10

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Solution

The fourth proportional to 13,963.86, 20,887.20 and 12,914.10 is: 19,316.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,963.86 : 20,887.20 = 12,914.10 : x
  2. Step 2: Convert to fraction form
    13,963.86/20,887.20 = 12,914.10/x
  3. Step 3: Cross multiply
    13,963.86x = 20,887.20 × 12,914.10
  4. Step 4: Simplify right side
    13,963.86x = 269,739,389.52
  5. Step 5: Solve for x
    x = 269,739,389.52/13,963.86
  6. Step 6: Final answer
    x = 19,316.96

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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.