Home / 18,912.24-28,357.29-6,428.12

Finding the Fourth Proportional to 18,912.24, 28,357.29 and 6,428.12

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Solution

The fourth proportional to 18,912.24, 28,357.29 and 6,428.12 is: 9,638.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912.24 : 28,357.29 = 6,428.12 : x
  2. Step 2: Convert to fraction form
    18,912.24/28,357.29 = 6,428.12/x
  3. Step 3: Cross multiply
    18,912.24x = 28,357.29 × 6,428.12
  4. Step 4: Simplify right side
    18,912.24x = 182,283,921.21
  5. Step 5: Solve for x
    x = 182,283,921.21/18,912.24
  6. Step 6: Final answer
    x = 9,638.41

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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.