Home / 21,031.13-31,546.69-5,448.75

Finding the Fourth Proportional to 21,031.13, 31,546.69 and 5,448.75

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Solution

The fourth proportional to 21,031.13, 31,546.69 and 5,448.75 is: 8,173.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.13 : 31,546.69 = 5,448.75 : x
  2. Step 2: Convert to fraction form
    21,031.13/31,546.69 = 5,448.75/x
  3. Step 3: Cross multiply
    21,031.13x = 31,546.69 × 5,448.75
  4. Step 4: Simplify right side
    21,031.13x = 171,890,027.14
  5. Step 5: Solve for x
    x = 171,890,027.14/21,031.13
  6. Step 6: Final answer
    x = 8,173.12

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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.