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Finding the Fourth Proportional to 15,245.84, 20,992.53 and 13,346.80

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Solution

The fourth proportional to 15,245.84, 20,992.53 and 13,346.80 is: 18,377.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,245.84 : 20,992.53 = 13,346.80 : x
  2. Step 2: Convert to fraction form
    15,245.84/20,992.53 = 13,346.80/x
  3. Step 3: Cross multiply
    15,245.84x = 20,992.53 × 13,346.80
  4. Step 4: Simplify right side
    15,245.84x = 280,183,099.40
  5. Step 5: Solve for x
    x = 280,183,099.40/15,245.84
  6. Step 6: Final answer
    x = 18,377.68

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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.