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Finding the Fourth Proportional to 8,671.78, 13,007.70 and 2,515.78

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Solution

The fourth proportional to 8,671.78, 13,007.70 and 2,515.78 is: 3,773.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,671.78 : 13,007.70 = 2,515.78 : x
  2. Step 2: Convert to fraction form
    8,671.78/13,007.70 = 2,515.78/x
  3. Step 3: Cross multiply
    8,671.78x = 13,007.70 × 2,515.78
  4. Step 4: Simplify right side
    8,671.78x = 32,724,511.51
  5. Step 5: Solve for x
    x = 32,724,511.51/8,671.78
  6. Step 6: Final answer
    x = 3,773.68

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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.