Home / 5,428.48-8,142.72-1,324.48

Finding the Fourth Proportional to 5,428.48, 8,142.72 and 1,324.48

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Solution

The fourth proportional to 5,428.48, 8,142.72 and 1,324.48 is: 1,986.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.48 : 8,142.72 = 1,324.48 : x
  2. Step 2: Convert to fraction form
    5,428.48/8,142.72 = 1,324.48/x
  3. Step 3: Cross multiply
    5,428.48x = 8,142.72 × 1,324.48
  4. Step 4: Simplify right side
    5,428.48x = 10,784,869.79
  5. Step 5: Solve for x
    x = 10,784,869.79/5,428.48
  6. Step 6: Final answer
    x = 1,986.72

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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.