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Finding the Fourth Proportional to 17,906.16, 26,885.16 and 12,981.36

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Solution

The fourth proportional to 17,906.16, 26,885.16 and 12,981.36 is: 19,490.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,906.16 : 26,885.16 = 12,981.36 : x
  2. Step 2: Convert to fraction form
    17,906.16/26,885.16 = 12,981.36/x
  3. Step 3: Cross multiply
    17,906.16x = 26,885.16 × 12,981.36
  4. Step 4: Simplify right side
    17,906.16x = 349,005,940.62
  5. Step 5: Solve for x
    x = 349,005,940.62/17,906.16
  6. Step 6: Final answer
    x = 19,490.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.