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Finding the Fourth Proportional to 15,189.53, 20,961.48 and 8,475.16

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Solution

The fourth proportional to 15,189.53, 20,961.48 and 8,475.16 is: 11,695.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,189.53 : 20,961.48 = 8,475.16 : x
  2. Step 2: Convert to fraction form
    15,189.53/20,961.48 = 8,475.16/x
  3. Step 3: Cross multiply
    15,189.53x = 20,961.48 × 8,475.16
  4. Step 4: Simplify right side
    15,189.53x = 177,651,896.84
  5. Step 5: Solve for x
    x = 177,651,896.84/15,189.53
  6. Step 6: Final answer
    x = 11,695.68

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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.