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Finding the Fourth Proportional to 18,702.54, 25,789.41 and 18,426.78

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Solution

The fourth proportional to 18,702.54, 25,789.41 and 18,426.78 is: 25,409.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702.54 : 25,789.41 = 18,426.78 : x
  2. Step 2: Convert to fraction form
    18,702.54/25,789.41 = 18,426.78/x
  3. Step 3: Cross multiply
    18,702.54x = 25,789.41 × 18,426.78
  4. Step 4: Simplify right side
    18,702.54x = 475,215,784.40
  5. Step 5: Solve for x
    x = 475,215,784.40/18,702.54
  6. Step 6: Final answer
    x = 25,409.16

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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.