Home / 10,919.80-16,355.40-5,719.60

Finding the Fourth Proportional to 10,919.80, 16,355.40 and 5,719.60

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Solution

The fourth proportional to 10,919.80, 16,355.40 and 5,719.60 is: 8,566.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,919.80 : 16,355.40 = 5,719.60 : x
  2. Step 2: Convert to fraction form
    10,919.80/16,355.40 = 5,719.60/x
  3. Step 3: Cross multiply
    10,919.80x = 16,355.40 × 5,719.60
  4. Step 4: Simplify right side
    10,919.80x = 93,546,345.84
  5. Step 5: Solve for x
    x = 93,546,345.84/10,919.80
  6. Step 6: Final answer
    x = 8,566.67

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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.