Home / 10,991.56-16,485.51-3,970.21

Finding the Fourth Proportional to 10,991.56, 16,485.51 and 3,970.21

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Solution

The fourth proportional to 10,991.56, 16,485.51 and 3,970.21 is: 5,954.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.56 : 16,485.51 = 3,970.21 : x
  2. Step 2: Convert to fraction form
    10,991.56/16,485.51 = 3,970.21/x
  3. Step 3: Cross multiply
    10,991.56x = 16,485.51 × 3,970.21
  4. Step 4: Simplify right side
    10,991.56x = 65,450,936.66
  5. Step 5: Solve for x
    x = 65,450,936.66/10,991.56
  6. Step 6: Final answer
    x = 5,954.65

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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.