Home / 15,449.21-21,319.34-8,375.48

Finding the Fourth Proportional to 15,449.21, 21,319.34 and 8,375.48

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Solution

The fourth proportional to 15,449.21, 21,319.34 and 8,375.48 is: 11,557.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,449.21 : 21,319.34 = 8,375.48 : x
  2. Step 2: Convert to fraction form
    15,449.21/21,319.34 = 8,375.48/x
  3. Step 3: Cross multiply
    15,449.21x = 21,319.34 × 8,375.48
  4. Step 4: Simplify right side
    15,449.21x = 178,559,705.78
  5. Step 5: Solve for x
    x = 178,559,705.78/15,449.21
  6. Step 6: Final answer
    x = 11,557.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.