Home / 21,145.68-29,179.71-11,713.50

Finding the Fourth Proportional to 21,145.68, 29,179.71 and 11,713.50

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Solution

The fourth proportional to 21,145.68, 29,179.71 and 11,713.50 is: 16,163.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.68 : 29,179.71 = 11,713.50 : x
  2. Step 2: Convert to fraction form
    21,145.68/29,179.71 = 11,713.50/x
  3. Step 3: Cross multiply
    21,145.68x = 29,179.71 × 11,713.50
  4. Step 4: Simplify right side
    21,145.68x = 341,796,533.09
  5. Step 5: Solve for x
    x = 341,796,533.09/21,145.68
  6. Step 6: Final answer
    x = 16,163.89

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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.