Home / 21,008.68-28,991.61-11,448.66

Finding the Fourth Proportional to 21,008.68, 28,991.61 and 11,448.66

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Solution

The fourth proportional to 21,008.68, 28,991.61 and 11,448.66 is: 15,798.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.68 : 28,991.61 = 11,448.66 : x
  2. Step 2: Convert to fraction form
    21,008.68/28,991.61 = 11,448.66/x
  3. Step 3: Cross multiply
    21,008.68x = 28,991.61 × 11,448.66
  4. Step 4: Simplify right side
    21,008.68x = 331,914,940.78
  5. Step 5: Solve for x
    x = 331,914,940.78/21,008.68
  6. Step 6: Final answer
    x = 15,798.94

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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.