Home / 21,006.62-28,989.14-11,575.40

Finding the Fourth Proportional to 21,006.62, 28,989.14 and 11,575.40

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Solution

The fourth proportional to 21,006.62, 28,989.14 and 11,575.40 is: 15,974.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.62 : 28,989.14 = 11,575.40 : x
  2. Step 2: Convert to fraction form
    21,006.62/28,989.14 = 11,575.40/x
  3. Step 3: Cross multiply
    21,006.62x = 28,989.14 × 11,575.40
  4. Step 4: Simplify right side
    21,006.62x = 335,560,891.16
  5. Step 5: Solve for x
    x = 335,560,891.16/21,006.62
  6. Step 6: Final answer
    x = 15,974.05

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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.