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Finding the Fourth Proportional to 10,689.90, 16,014.45 and 5,757.90

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Solution

The fourth proportional to 10,689.90, 16,014.45 and 5,757.90 is: 8,625.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,689.90 : 16,014.45 = 5,757.90 : x
  2. Step 2: Convert to fraction form
    10,689.90/16,014.45 = 5,757.90/x
  3. Step 3: Cross multiply
    10,689.90x = 16,014.45 × 5,757.90
  4. Step 4: Simplify right side
    10,689.90x = 92,209,601.66
  5. Step 5: Solve for x
    x = 92,209,601.66/10,689.90
  6. Step 6: Final answer
    x = 8,625.86

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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.