Home / 5,855.20-8,782.80-2,156.20

Finding the Fourth Proportional to 5,855.20, 8,782.80 and 2,156.20

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Solution

The fourth proportional to 5,855.20, 8,782.80 and 2,156.20 is: 3,234.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,855.20 : 8,782.80 = 2,156.20 : x
  2. Step 2: Convert to fraction form
    5,855.20/8,782.80 = 2,156.20/x
  3. Step 3: Cross multiply
    5,855.20x = 8,782.80 × 2,156.20
  4. Step 4: Simplify right side
    5,855.20x = 18,937,473.36
  5. Step 5: Solve for x
    x = 18,937,473.36/5,855.20
  6. Step 6: Final answer
    x = 3,234.30

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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.