Home / 15,891.48-21,930.26-8,817.90

Finding the Fourth Proportional to 15,891.48, 21,930.26 and 8,817.90

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Solution

The fourth proportional to 15,891.48, 21,930.26 and 8,817.90 is: 12,168.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,891.48 : 21,930.26 = 8,817.90 : x
  2. Step 2: Convert to fraction form
    15,891.48/21,930.26 = 8,817.90/x
  3. Step 3: Cross multiply
    15,891.48x = 21,930.26 × 8,817.90
  4. Step 4: Simplify right side
    15,891.48x = 193,378,713.33
  5. Step 5: Solve for x
    x = 193,378,713.33/15,891.48
  6. Step 6: Final answer
    x = 12,168.70

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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.