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Finding the Fourth Proportional to 15,659.64, 21,610.74 and 8,586.54

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Solution

The fourth proportional to 15,659.64, 21,610.74 and 8,586.54 is: 11,849.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,659.64 : 21,610.74 = 8,586.54 : x
  2. Step 2: Convert to fraction form
    15,659.64/21,610.74 = 8,586.54/x
  3. Step 3: Cross multiply
    15,659.64x = 21,610.74 × 8,586.54
  4. Step 4: Simplify right side
    15,659.64x = 185,561,483.44
  5. Step 5: Solve for x
    x = 185,561,483.44/15,659.64
  6. Step 6: Final answer
    x = 11,849.66

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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.