Home / 15,905.97-21,948.57-9,191.07

Finding the Fourth Proportional to 15,905.97, 21,948.57 and 9,191.07

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Solution

The fourth proportional to 15,905.97, 21,948.57 and 9,191.07 is: 12,682.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,905.97 : 21,948.57 = 9,191.07 : x
  2. Step 2: Convert to fraction form
    15,905.97/21,948.57 = 9,191.07/x
  3. Step 3: Cross multiply
    15,905.97x = 21,948.57 × 9,191.07
  4. Step 4: Simplify right side
    15,905.97x = 201,730,843.27
  5. Step 5: Solve for x
    x = 201,730,843.27/15,905.97
  6. Step 6: Final answer
    x = 12,682.71

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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.