Home / 8,511.90-12,755.36-4,289.38

Finding the Fourth Proportional to 8,511.90, 12,755.36 and 4,289.38

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Solution

The fourth proportional to 8,511.90, 12,755.36 and 4,289.38 is: 6,427.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,511.90 : 12,755.36 = 4,289.38 : x
  2. Step 2: Convert to fraction form
    8,511.90/12,755.36 = 4,289.38/x
  3. Step 3: Cross multiply
    8,511.90x = 12,755.36 × 4,289.38
  4. Step 4: Simplify right side
    8,511.90x = 54,712,586.08
  5. Step 5: Solve for x
    x = 54,712,586.08/8,511.90
  6. Step 6: Final answer
    x = 6,427.78

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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.