Home / 9,989.21-14,990.49-4,145.82

Finding the Fourth Proportional to 9,989.21, 14,990.49 and 4,145.82

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Solution

The fourth proportional to 9,989.21, 14,990.49 and 4,145.82 is: 6,221.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989.21 : 14,990.49 = 4,145.82 : x
  2. Step 2: Convert to fraction form
    9,989.21/14,990.49 = 4,145.82/x
  3. Step 3: Cross multiply
    9,989.21x = 14,990.49 × 4,145.82
  4. Step 4: Simplify right side
    9,989.21x = 62,147,873.25
  5. Step 5: Solve for x
    x = 62,147,873.25/9,989.21
  6. Step 6: Final answer
    x = 6,221.50

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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.