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Finding the Fourth Proportional to 10,415.59, 15,605.19 and 8,671.80

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Solution

The fourth proportional to 10,415.59, 15,605.19 and 8,671.80 is: 12,992.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,415.59 : 15,605.19 = 8,671.80 : x
  2. Step 2: Convert to fraction form
    10,415.59/15,605.19 = 8,671.80/x
  3. Step 3: Cross multiply
    10,415.59x = 15,605.19 × 8,671.80
  4. Step 4: Simplify right side
    10,415.59x = 135,325,086.64
  5. Step 5: Solve for x
    x = 135,325,086.64/10,415.59
  6. Step 6: Final answer
    x = 12,992.55

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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.