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Finding the Fourth Proportional to 13,610.61, 20,416.86 and 3,748.86

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Solution

The fourth proportional to 13,610.61, 20,416.86 and 3,748.86 is: 5,623.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,610.61 : 20,416.86 = 3,748.86 : x
  2. Step 2: Convert to fraction form
    13,610.61/20,416.86 = 3,748.86/x
  3. Step 3: Cross multiply
    13,610.61x = 20,416.86 × 3,748.86
  4. Step 4: Simplify right side
    13,610.61x = 76,539,949.78
  5. Step 5: Solve for x
    x = 76,539,949.78/13,610.61
  6. Step 6: Final answer
    x = 5,623.55

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1.5x scale

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.