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Finding the Fourth Proportional to 17,102.60, 25,653.90 and 5,415.80

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Solution

The fourth proportional to 17,102.60, 25,653.90 and 5,415.80 is: 8,123.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,102.60 : 25,653.90 = 5,415.80 : x
  2. Step 2: Convert to fraction form
    17,102.60/25,653.90 = 5,415.80/x
  3. Step 3: Cross multiply
    17,102.60x = 25,653.90 × 5,415.80
  4. Step 4: Simplify right side
    17,102.60x = 138,936,391.62
  5. Step 5: Solve for x
    x = 138,936,391.62/17,102.60
  6. Step 6: Final answer
    x = 8,123.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.