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Finding the Fourth Proportional to 18,803.70, 25,948.29 and 11,245.55

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Solution

The fourth proportional to 18,803.70, 25,948.29 and 11,245.55 is: 15,518.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.70 : 25,948.29 = 11,245.55 : x
  2. Step 2: Convert to fraction form
    18,803.70/25,948.29 = 11,245.55/x
  3. Step 3: Cross multiply
    18,803.70x = 25,948.29 × 11,245.55
  4. Step 4: Simplify right side
    18,803.70x = 291,802,662.87
  5. Step 5: Solve for x
    x = 291,802,662.87/18,803.70
  6. Step 6: Final answer
    x = 15,518.36

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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.