Home / 5,240.76-7,855.47-2,643.90

Finding the Fourth Proportional to 5,240.76, 7,855.47 and 2,643.90

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Solution

The fourth proportional to 5,240.76, 7,855.47 and 2,643.90 is: 3,962.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,240.76 : 7,855.47 = 2,643.90 : x
  2. Step 2: Convert to fraction form
    5,240.76/7,855.47 = 2,643.90/x
  3. Step 3: Cross multiply
    5,240.76x = 7,855.47 × 2,643.90
  4. Step 4: Simplify right side
    5,240.76x = 20,769,077.13
  5. Step 5: Solve for x
    x = 20,769,077.13/5,240.76
  6. Step 6: Final answer
    x = 3,962.99

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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.