Home / 13,991.45-19,311.50-8,690.27

Finding the Fourth Proportional to 13,991.45, 19,311.50 and 8,690.27

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Solution

The fourth proportional to 13,991.45, 19,311.50 and 8,690.27 is: 11,994.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.45 : 19,311.50 = 8,690.27 : x
  2. Step 2: Convert to fraction form
    13,991.45/19,311.50 = 8,690.27/x
  3. Step 3: Cross multiply
    13,991.45x = 19,311.50 × 8,690.27
  4. Step 4: Simplify right side
    13,991.45x = 167,822,149.11
  5. Step 5: Solve for x
    x = 167,822,149.11/13,991.45
  6. Step 6: Final answer
    x = 11,994.62

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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.