Home / 21,145.61-31,721.14-7,099.60

Finding the Fourth Proportional to 21,145.61, 31,721.14 and 7,099.60

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Solution

The fourth proportional to 21,145.61, 31,721.14 and 7,099.60 is: 10,650.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.61 : 31,721.14 = 7,099.60 : x
  2. Step 2: Convert to fraction form
    21,145.61/31,721.14 = 7,099.60/x
  3. Step 3: Cross multiply
    21,145.61x = 31,721.14 × 7,099.60
  4. Step 4: Simplify right side
    21,145.61x = 225,207,414.56
  5. Step 5: Solve for x
    x = 225,207,414.56/21,145.61
  6. Step 6: Final answer
    x = 10,650.32

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1.5x scale

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.