Home / 5,390.80-8,069.47-2,919.49

Finding the Fourth Proportional to 5,390.80, 8,069.47 and 2,919.49

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Solution

The fourth proportional to 5,390.80, 8,069.47 and 2,919.49 is: 4,370.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.80 : 8,069.47 = 2,919.49 : x
  2. Step 2: Convert to fraction form
    5,390.80/8,069.47 = 2,919.49/x
  3. Step 3: Cross multiply
    5,390.80x = 8,069.47 × 2,919.49
  4. Step 4: Simplify right side
    5,390.80x = 23,558,709.50
  5. Step 5: Solve for x
    x = 23,558,709.50/5,390.80
  6. Step 6: Final answer
    x = 4,370.17

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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.