Home / 21,006.75-28,988.49-11,446.72

Finding the Fourth Proportional to 21,006.75, 28,988.49 and 11,446.72

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Solution

The fourth proportional to 21,006.75, 28,988.49 and 11,446.72 is: 15,796.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,006.75 : 28,988.49 = 11,446.72 : x
  2. Step 2: Convert to fraction form
    21,006.75/28,988.49 = 11,446.72/x
  3. Step 3: Cross multiply
    21,006.75x = 28,988.49 × 11,446.72
  4. Step 4: Simplify right side
    21,006.75x = 331,823,128.25
  5. Step 5: Solve for x
    x = 331,823,128.25/21,006.75
  6. Step 6: Final answer
    x = 15,796.02

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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.