Home / 10,912.40-16,368.48-3,121.16

Finding the Fourth Proportional to 10,912.40, 16,368.48 and 3,121.16

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Solution

The fourth proportional to 10,912.40, 16,368.48 and 3,121.16 is: 4,681.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,912.40 : 16,368.48 = 3,121.16 : x
  2. Step 2: Convert to fraction form
    10,912.40/16,368.48 = 3,121.16/x
  3. Step 3: Cross multiply
    10,912.40x = 16,368.48 × 3,121.16
  4. Step 4: Simplify right side
    10,912.40x = 51,088,645.04
  5. Step 5: Solve for x
    x = 51,088,645.04/10,912.40
  6. Step 6: Final answer
    x = 4,681.71

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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.