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Finding the Fourth Proportional to 18,813.75, 25,963.79 and 11,258.63

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Solution

The fourth proportional to 18,813.75, 25,963.79 and 11,258.63 is: 15,537.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.75 : 25,963.79 = 11,258.63 : x
  2. Step 2: Convert to fraction form
    18,813.75/25,963.79 = 11,258.63/x
  3. Step 3: Cross multiply
    18,813.75x = 25,963.79 × 11,258.63
  4. Step 4: Simplify right side
    18,813.75x = 292,316,518.90
  5. Step 5: Solve for x
    x = 292,316,518.90/18,813.75
  6. Step 6: Final answer
    x = 15,537.39

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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.