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Finding the Fourth Proportional to 18,899.33, 26,085.90 and 11,345.97

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Solution

The fourth proportional to 18,899.33, 26,085.90 and 11,345.97 is: 15,660.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,899.33 : 26,085.90 = 11,345.97 : x
  2. Step 2: Convert to fraction form
    18,899.33/26,085.90 = 11,345.97/x
  3. Step 3: Cross multiply
    18,899.33x = 26,085.90 × 11,345.97
  4. Step 4: Simplify right side
    18,899.33x = 295,969,915.37
  5. Step 5: Solve for x
    x = 295,969,915.37/18,899.33
  6. Step 6: Final answer
    x = 15,660.34

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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.