Home / 21,195.07-31,799.54-8,720.97

Finding the Fourth Proportional to 21,195.07, 31,799.54 and 8,720.97

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Solution

The fourth proportional to 21,195.07, 31,799.54 and 8,720.97 is: 13,084.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195.07 : 31,799.54 = 8,720.97 : x
  2. Step 2: Convert to fraction form
    21,195.07/31,799.54 = 8,720.97/x
  3. Step 3: Cross multiply
    21,195.07x = 31,799.54 × 8,720.97
  4. Step 4: Simplify right side
    21,195.07x = 277,322,631.75
  5. Step 5: Solve for x
    x = 277,322,631.75/21,195.07
  6. Step 6: Final answer
    x = 13,084.30

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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.