Home / 8,991.14-13,478.94-3,989.79

Finding the Fourth Proportional to 8,991.14, 13,478.94 and 3,989.79

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Solution

The fourth proportional to 8,991.14, 13,478.94 and 3,989.79 is: 5,981.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.14 : 13,478.94 = 3,989.79 : x
  2. Step 2: Convert to fraction form
    8,991.14/13,478.94 = 3,989.79/x
  3. Step 3: Cross multiply
    8,991.14x = 13,478.94 × 3,989.79
  4. Step 4: Simplify right side
    8,991.14x = 53,778,140.02
  5. Step 5: Solve for x
    x = 53,778,140.02/8,991.14
  6. Step 6: Final answer
    x = 5,981.24

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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.