Home / 5,428.84-8,143.28-1,324.84

Finding the Fourth Proportional to 5,428.84, 8,143.28 and 1,324.84

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Solution

The fourth proportional to 5,428.84, 8,143.28 and 1,324.84 is: 1,987.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.84 : 8,143.28 = 1,324.84 : x
  2. Step 2: Convert to fraction form
    5,428.84/8,143.28 = 1,324.84/x
  3. Step 3: Cross multiply
    5,428.84x = 8,143.28 × 1,324.84
  4. Step 4: Simplify right side
    5,428.84x = 10,788,543.08
  5. Step 5: Solve for x
    x = 10,788,543.08/5,428.84
  6. Step 6: Final answer
    x = 1,987.26

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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.