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Finding the Fourth Proportional to 9,989.32, 14,975.34 and 3,829

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Solution

The fourth proportional to 9,989.32, 14,975.34 and 3,829 is: 5,740.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989.32 : 14,975.34 = 3,829 : x
  2. Step 2: Convert to fraction form
    9,989.32/14,975.34 = 3,829/x
  3. Step 3: Cross multiply
    9,989.32x = 14,975.34 × 3,829
  4. Step 4: Simplify right side
    9,989.32x = 57,340,576.86
  5. Step 5: Solve for x
    x = 57,340,576.86/9,989.32
  6. Step 6: Final answer
    x = 5,740.19

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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.