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Finding the Fourth Proportional to 15,914.16, 21,960.68 and 8,840.13

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Solution

The fourth proportional to 15,914.16, 21,960.68 and 8,840.13 is: 12,198.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,914.16 : 21,960.68 = 8,840.13 : x
  2. Step 2: Convert to fraction form
    15,914.16/21,960.68 = 8,840.13/x
  3. Step 3: Cross multiply
    15,914.16x = 21,960.68 × 8,840.13
  4. Step 4: Simplify right side
    15,914.16x = 194,135,266.09
  5. Step 5: Solve for x
    x = 194,135,266.09/15,914.16
  6. Step 6: Final answer
    x = 12,198.90

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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.