Home / 21,008.84-28,991.13-11,575.58

Finding the Fourth Proportional to 21,008.84, 28,991.13 and 11,575.58

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Solution

The fourth proportional to 21,008.84, 28,991.13 and 11,575.58 is: 15,973.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.84 : 28,991.13 = 11,575.58 : x
  2. Step 2: Convert to fraction form
    21,008.84/28,991.13 = 11,575.58/x
  3. Step 3: Cross multiply
    21,008.84x = 28,991.13 × 11,575.58
  4. Step 4: Simplify right side
    21,008.84x = 335,589,144.61
  5. Step 5: Solve for x
    x = 335,589,144.61/21,008.84
  6. Step 6: Final answer
    x = 15,973.71

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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.