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Finding the Fourth Proportional to 15,704.15, 21,671.48 and 8,630.42

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Solution

The fourth proportional to 15,704.15, 21,671.48 and 8,630.42 is: 11,909.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,704.15 : 21,671.48 = 8,630.42 : x
  2. Step 2: Convert to fraction form
    15,704.15/21,671.48 = 8,630.42/x
  3. Step 3: Cross multiply
    15,704.15x = 21,671.48 × 8,630.42
  4. Step 4: Simplify right side
    15,704.15x = 187,033,822.91
  5. Step 5: Solve for x
    x = 187,033,822.91/15,704.15
  6. Step 6: Final answer
    x = 11,909.84

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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.