Home / 8,431.78-12,647.31-2,885.62

Finding the Fourth Proportional to 8,431.78, 12,647.31 and 2,885.62

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Solution

The fourth proportional to 8,431.78, 12,647.31 and 2,885.62 is: 4,328.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,431.78 : 12,647.31 = 2,885.62 : x
  2. Step 2: Convert to fraction form
    8,431.78/12,647.31 = 2,885.62/x
  3. Step 3: Cross multiply
    8,431.78x = 12,647.31 × 2,885.62
  4. Step 4: Simplify right side
    8,431.78x = 36,495,330.68
  5. Step 5: Solve for x
    x = 36,495,330.68/8,431.78
  6. Step 6: Final answer
    x = 4,328.31

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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.