Home / 13,416.50-18,515.58-8,112.62

Finding the Fourth Proportional to 13,416.50, 18,515.58 and 8,112.62

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Solution

The fourth proportional to 13,416.50, 18,515.58 and 8,112.62 is: 11,195.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,416.50 : 18,515.58 = 8,112.62 : x
  2. Step 2: Convert to fraction form
    13,416.50/18,515.58 = 8,112.62/x
  3. Step 3: Cross multiply
    13,416.50x = 18,515.58 × 8,112.62
  4. Step 4: Simplify right side
    13,416.50x = 150,209,864.62
  5. Step 5: Solve for x
    x = 150,209,864.62/13,416.50
  6. Step 6: Final answer
    x = 11,195.91

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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.