Home / 15,883.78-21,906.03-12,857.35

Finding the Fourth Proportional to 15,883.78, 21,906.03 and 12,857.35

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Solution

The fourth proportional to 15,883.78, 21,906.03 and 12,857.35 is: 17,732.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,883.78 : 21,906.03 = 12,857.35 : x
  2. Step 2: Convert to fraction form
    15,883.78/21,906.03 = 12,857.35/x
  3. Step 3: Cross multiply
    15,883.78x = 21,906.03 × 12,857.35
  4. Step 4: Simplify right side
    15,883.78x = 281,653,494.82
  5. Step 5: Solve for x
    x = 281,653,494.82/15,883.78
  6. Step 6: Final answer
    x = 17,732.15

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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.