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Finding the Fourth Proportional to 18,216.60, 25,139 and 10,258.96

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Solution

The fourth proportional to 18,216.60, 25,139 and 10,258.96 is: 14,157.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,216.60 : 25,139 = 10,258.96 : x
  2. Step 2: Convert to fraction form
    18,216.60/25,139 = 10,258.96/x
  3. Step 3: Cross multiply
    18,216.60x = 25,139 × 10,258.96
  4. Step 4: Simplify right side
    18,216.60x = 257,899,995.44
  5. Step 5: Solve for x
    x = 257,899,995.44/18,216.60
  6. Step 6: Final answer
    x = 14,157.42

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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.