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Finding the Fourth Proportional to 18,594.72, 25,650 and 11,138.40

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Solution

The fourth proportional to 18,594.72, 25,650 and 11,138.40 is: 15,364.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,594.72 : 25,650 = 11,138.40 : x
  2. Step 2: Convert to fraction form
    18,594.72/25,650 = 11,138.40/x
  3. Step 3: Cross multiply
    18,594.72x = 25,650 × 11,138.40
  4. Step 4: Simplify right side
    18,594.72x = 285,699,960
  5. Step 5: Solve for x
    x = 285,699,960/18,594.72
  6. Step 6: Final answer
    x = 15,364.57

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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.