Home / 21,081.09-31,627.10-11,212.25

Finding the Fourth Proportional to 21,081.09, 31,627.10 and 11,212.25

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Solution

The fourth proportional to 21,081.09, 31,627.10 and 11,212.25 is: 16,821.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.09 : 31,627.10 = 11,212.25 : x
  2. Step 2: Convert to fraction form
    21,081.09/31,627.10 = 11,212.25/x
  3. Step 3: Cross multiply
    21,081.09x = 31,627.10 × 11,212.25
  4. Step 4: Simplify right side
    21,081.09x = 354,610,951.98
  5. Step 5: Solve for x
    x = 354,610,951.98/21,081.09
  6. Step 6: Final answer
    x = 16,821.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.