Home / 15,505.44-21,396.63-8,431.86

Finding the Fourth Proportional to 15,505.44, 21,396.63 and 8,431.86

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Solution

The fourth proportional to 15,505.44, 21,396.63 and 8,431.86 is: 11,635.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.44 : 21,396.63 = 8,431.86 : x
  2. Step 2: Convert to fraction form
    15,505.44/21,396.63 = 8,431.86/x
  3. Step 3: Cross multiply
    15,505.44x = 21,396.63 × 8,431.86
  4. Step 4: Simplify right side
    15,505.44x = 180,413,388.63
  5. Step 5: Solve for x
    x = 180,413,388.63/15,505.44
  6. Step 6: Final answer
    x = 11,635.49

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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.