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Finding the Fourth Proportional to 21,259.70, 31,889.94 and 9,250.64

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Solution

The fourth proportional to 21,259.70, 31,889.94 and 9,250.64 is: 13,876.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,259.70 : 31,889.94 = 9,250.64 : x
  2. Step 2: Convert to fraction form
    21,259.70/31,889.94 = 9,250.64/x
  3. Step 3: Cross multiply
    21,259.70x = 31,889.94 × 9,250.64
  4. Step 4: Simplify right side
    21,259.70x = 295,002,354.56
  5. Step 5: Solve for x
    x = 295,002,354.56/21,259.70
  6. Step 6: Final answer
    x = 13,876.13

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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.