Home / 21,274.08-31,915-6,481.32

Finding the Fourth Proportional to 21,274.08, 31,915 and 6,481.32

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Solution

The fourth proportional to 21,274.08, 31,915 and 6,481.32 is: 9,723.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,274.08 : 31,915 = 6,481.32 : x
  2. Step 2: Convert to fraction form
    21,274.08/31,915 = 6,481.32/x
  3. Step 3: Cross multiply
    21,274.08x = 31,915 × 6,481.32
  4. Step 4: Simplify right side
    21,274.08x = 206,851,327.80
  5. Step 5: Solve for x
    x = 206,851,327.80/21,274.08
  6. Step 6: Final answer
    x = 9,723.16

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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.