Home / 12,821.28-19,220.94-5,028.30

Finding the Fourth Proportional to 12,821.28, 19,220.94 and 5,028.30

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Solution

The fourth proportional to 12,821.28, 19,220.94 and 5,028.30 is: 7,538.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.28 : 19,220.94 = 5,028.30 : x
  2. Step 2: Convert to fraction form
    12,821.28/19,220.94 = 5,028.30/x
  3. Step 3: Cross multiply
    12,821.28x = 19,220.94 × 5,028.30
  4. Step 4: Simplify right side
    12,821.28x = 96,648,652.60
  5. Step 5: Solve for x
    x = 96,648,652.60/12,821.28
  6. Step 6: Final answer
    x = 7,538.14

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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.