Home / 6,619.60-9,929.40-5,388.40

Finding the Fourth Proportional to 6,619.60, 9,929.40 and 5,388.40

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Solution

The fourth proportional to 6,619.60, 9,929.40 and 5,388.40 is: 8,082.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,619.60 : 9,929.40 = 5,388.40 : x
  2. Step 2: Convert to fraction form
    6,619.60/9,929.40 = 5,388.40/x
  3. Step 3: Cross multiply
    6,619.60x = 9,929.40 × 5,388.40
  4. Step 4: Simplify right side
    6,619.60x = 53,503,578.96
  5. Step 5: Solve for x
    x = 53,503,578.96/6,619.60
  6. Step 6: Final answer
    x = 8,082.60

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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.