Home / 10,912.32-16,369.02-3,121.20

Finding the Fourth Proportional to 10,912.32, 16,369.02 and 3,121.20

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Solution

The fourth proportional to 10,912.32, 16,369.02 and 3,121.20 is: 4,681.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,912.32 : 16,369.02 = 3,121.20 : x
  2. Step 2: Convert to fraction form
    10,912.32/16,369.02 = 3,121.20/x
  3. Step 3: Cross multiply
    10,912.32x = 16,369.02 × 3,121.20
  4. Step 4: Simplify right side
    10,912.32x = 51,090,985.22
  5. Step 5: Solve for x
    x = 51,090,985.22/10,912.32
  6. Step 6: Final answer
    x = 4,681.95

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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.