Home / 5,389.92-7,440.12-3,819.60

Finding the Fourth Proportional to 5,389.92, 7,440.12 and 3,819.60

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Solution

The fourth proportional to 5,389.92, 7,440.12 and 3,819.60 is: 5,272.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,389.92 : 7,440.12 = 3,819.60 : x
  2. Step 2: Convert to fraction form
    5,389.92/7,440.12 = 3,819.60/x
  3. Step 3: Cross multiply
    5,389.92x = 7,440.12 × 3,819.60
  4. Step 4: Simplify right side
    5,389.92x = 28,418,282.35
  5. Step 5: Solve for x
    x = 28,418,282.35/5,389.92
  6. Step 6: Final answer
    x = 5,272.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.