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Finding the Fourth Proportional to 18,703.95, 25,811.73 and 11,154.66

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Solution

The fourth proportional to 18,703.95, 25,811.73 and 11,154.66 is: 15,393.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.95 : 25,811.73 = 11,154.66 : x
  2. Step 2: Convert to fraction form
    18,703.95/25,811.73 = 11,154.66/x
  3. Step 3: Cross multiply
    18,703.95x = 25,811.73 × 11,154.66
  4. Step 4: Simplify right side
    18,703.95x = 287,921,072.16
  5. Step 5: Solve for x
    x = 287,921,072.16/18,703.95
  6. Step 6: Final answer
    x = 15,393.60

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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.