Home / 21,008.27-28,991.14-11,448.57

Finding the Fourth Proportional to 21,008.27, 28,991.14 and 11,448.57

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Solution

The fourth proportional to 21,008.27, 28,991.14 and 11,448.57 is: 15,798.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.27 : 28,991.14 = 11,448.57 : x
  2. Step 2: Convert to fraction form
    21,008.27/28,991.14 = 11,448.57/x
  3. Step 3: Cross multiply
    21,008.27x = 28,991.14 × 11,448.57
  4. Step 4: Simplify right side
    21,008.27x = 331,907,240.16
  5. Step 5: Solve for x
    x = 331,907,240.16/21,008.27
  6. Step 6: Final answer
    x = 15,798.89

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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.