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Finding the Fourth Proportional to 18,415.84, 25,410.36 and 11,702.56

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Solution

The fourth proportional to 18,415.84, 25,410.36 and 11,702.56 is: 16,147.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,415.84 : 25,410.36 = 11,702.56 : x
  2. Step 2: Convert to fraction form
    18,415.84/25,410.36 = 11,702.56/x
  3. Step 3: Cross multiply
    18,415.84x = 25,410.36 × 11,702.56
  4. Step 4: Simplify right side
    18,415.84x = 297,366,262.52
  5. Step 5: Solve for x
    x = 297,366,262.52/18,415.84
  6. Step 6: Final answer
    x = 16,147.31

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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.