Home / 13,156.61-18,142.30-8,674.62

Finding the Fourth Proportional to 13,156.61, 18,142.30 and 8,674.62

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Solution

The fourth proportional to 13,156.61, 18,142.30 and 8,674.62 is: 11,961.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.61 : 18,142.30 = 8,674.62 : x
  2. Step 2: Convert to fraction form
    13,156.61/18,142.30 = 8,674.62/x
  3. Step 3: Cross multiply
    13,156.61x = 18,142.30 × 8,674.62
  4. Step 4: Simplify right side
    13,156.61x = 157,377,558.43
  5. Step 5: Solve for x
    x = 157,377,558.43/13,156.61
  6. Step 6: Final answer
    x = 11,961.86

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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.