Home / 20,621.51-30,936.81-8,774.65

Finding the Fourth Proportional to 20,621.51, 30,936.81 and 8,774.65

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Solution

The fourth proportional to 20,621.51, 30,936.81 and 8,774.65 is: 13,163.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.51 : 30,936.81 = 8,774.65 : x
  2. Step 2: Convert to fraction form
    20,621.51/30,936.81 = 8,774.65/x
  3. Step 3: Cross multiply
    20,621.51x = 30,936.81 × 8,774.65
  4. Step 4: Simplify right side
    20,621.51x = 271,459,525.18
  5. Step 5: Solve for x
    x = 271,459,525.18/20,621.51
  6. Step 6: Final answer
    x = 13,163.90

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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.