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Finding the Fourth Proportional to 18,995, 26,213.10 and 10,611.68

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Solution

The fourth proportional to 18,995, 26,213.10 and 10,611.68 is: 14,644.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,995 : 26,213.10 = 10,611.68 : x
  2. Step 2: Convert to fraction form
    18,995/26,213.10 = 10,611.68/x
  3. Step 3: Cross multiply
    18,995x = 26,213.10 × 10,611.68
  4. Step 4: Simplify right side
    18,995x = 278,165,029.01
  5. Step 5: Solve for x
    x = 278,165,029.01/18,995
  6. Step 6: Final answer
    x = 14,644.12

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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.