Home / 21,069.10-31,608.36-7,921.58

Finding the Fourth Proportional to 21,069.10, 31,608.36 and 7,921.58

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Solution

The fourth proportional to 21,069.10, 31,608.36 and 7,921.58 is: 11,884.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,069.10 : 31,608.36 = 7,921.58 : x
  2. Step 2: Convert to fraction form
    21,069.10/31,608.36 = 7,921.58/x
  3. Step 3: Cross multiply
    21,069.10x = 31,608.36 × 7,921.58
  4. Step 4: Simplify right side
    21,069.10x = 250,388,152.41
  5. Step 5: Solve for x
    x = 250,388,152.41/21,069.10
  6. Step 6: Final answer
    x = 11,884.14

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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.