Home / 21,230.94-31,858.72-8,748.64

Finding the Fourth Proportional to 21,230.94, 31,858.72 and 8,748.64

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Solution

The fourth proportional to 21,230.94, 31,858.72 and 8,748.64 is: 13,128.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,230.94 : 31,858.72 = 8,748.64 : x
  2. Step 2: Convert to fraction form
    21,230.94/31,858.72 = 8,748.64/x
  3. Step 3: Cross multiply
    21,230.94x = 31,858.72 × 8,748.64
  4. Step 4: Simplify right side
    21,230.94x = 278,720,490.09
  5. Step 5: Solve for x
    x = 278,720,490.09/21,230.94
  6. Step 6: Final answer
    x = 13,128.03

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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.