Home / 21,007.17-28,989.90-11,575.73

Finding the Fourth Proportional to 21,007.17, 28,989.90 and 11,575.73

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Solution

The fourth proportional to 21,007.17, 28,989.90 and 11,575.73 is: 15,974.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.17 : 28,989.90 = 11,575.73 : x
  2. Step 2: Convert to fraction form
    21,007.17/28,989.90 = 11,575.73/x
  3. Step 3: Cross multiply
    21,007.17x = 28,989.90 × 11,575.73
  4. Step 4: Simplify right side
    21,007.17x = 335,579,327.60
  5. Step 5: Solve for x
    x = 335,579,327.60/21,007.17
  6. Step 6: Final answer
    x = 15,974.51

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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.