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Finding the Fourth Proportional to 21,083.44, 31,625.72 and 9,987.44

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Solution

The fourth proportional to 21,083.44, 31,625.72 and 9,987.44 is: 14,981.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,083.44 : 31,625.72 = 9,987.44 : x
  2. Step 2: Convert to fraction form
    21,083.44/31,625.72 = 9,987.44/x
  3. Step 3: Cross multiply
    21,083.44x = 31,625.72 × 9,987.44
  4. Step 4: Simplify right side
    21,083.44x = 315,859,980.96
  5. Step 5: Solve for x
    x = 315,859,980.96/21,083.44
  6. Step 6: Final answer
    x = 14,981.43

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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.