Home / 21,913.11-32,871.48-7,121.70

Finding the Fourth Proportional to 21,913.11, 32,871.48 and 7,121.70

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Solution

The fourth proportional to 21,913.11, 32,871.48 and 7,121.70 is: 10,683.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,913.11 : 32,871.48 = 7,121.70 : x
  2. Step 2: Convert to fraction form
    21,913.11/32,871.48 = 7,121.70/x
  3. Step 3: Cross multiply
    21,913.11x = 32,871.48 × 7,121.70
  4. Step 4: Simplify right side
    21,913.11x = 234,100,819.12
  5. Step 5: Solve for x
    x = 234,100,819.12/21,913.11
  6. Step 6: Final answer
    x = 10,683.14

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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.