Home / 13,118.18-18,092.85-8,402.90

Finding the Fourth Proportional to 13,118.18, 18,092.85 and 8,402.90

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Solution

The fourth proportional to 13,118.18, 18,092.85 and 8,402.90 is: 11,589.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.18 : 18,092.85 = 8,402.90 : x
  2. Step 2: Convert to fraction form
    13,118.18/18,092.85 = 8,402.90/x
  3. Step 3: Cross multiply
    13,118.18x = 18,092.85 × 8,402.90
  4. Step 4: Simplify right side
    13,118.18x = 152,032,409.27
  5. Step 5: Solve for x
    x = 152,032,409.27/13,118.18
  6. Step 6: Final answer
    x = 11,589.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.