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Finding the Fourth Proportional to 18,258.51, 25,212.11 and 11,555.97

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Solution

The fourth proportional to 18,258.51, 25,212.11 and 11,555.97 is: 15,956.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,258.51 : 25,212.11 = 11,555.97 : x
  2. Step 2: Convert to fraction form
    18,258.51/25,212.11 = 11,555.97/x
  3. Step 3: Cross multiply
    18,258.51x = 25,212.11 × 11,555.97
  4. Step 4: Simplify right side
    18,258.51x = 291,350,299.47
  5. Step 5: Solve for x
    x = 291,350,299.47/18,258.51
  6. Step 6: Final answer
    x = 15,956.96

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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.