Home / 21,163.79-29,209.05-12,214.37

Finding the Fourth Proportional to 21,163.79, 29,209.05 and 12,214.37

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Solution

The fourth proportional to 21,163.79, 29,209.05 and 12,214.37 is: 16,857.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,163.79 : 29,209.05 = 12,214.37 : x
  2. Step 2: Convert to fraction form
    21,163.79/29,209.05 = 12,214.37/x
  3. Step 3: Cross multiply
    21,163.79x = 29,209.05 × 12,214.37
  4. Step 4: Simplify right side
    21,163.79x = 356,769,998.00
  5. Step 5: Solve for x
    x = 356,769,998.00/21,163.79
  6. Step 6: Final answer
    x = 16,857.57

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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.