Home / 15,855.76-21,882.20-8,782.84

Finding the Fourth Proportional to 15,855.76, 21,882.20 and 8,782.84

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Solution

The fourth proportional to 15,855.76, 21,882.20 and 8,782.84 is: 12,121.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,855.76 : 21,882.20 = 8,782.84 : x
  2. Step 2: Convert to fraction form
    15,855.76/21,882.20 = 8,782.84/x
  3. Step 3: Cross multiply
    15,855.76x = 21,882.20 × 8,782.84
  4. Step 4: Simplify right side
    15,855.76x = 192,187,861.45
  5. Step 5: Solve for x
    x = 192,187,861.45/15,855.76
  6. Step 6: Final answer
    x = 12,121.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.