Home / 12,861.08-17,750.20-8,145.80

Finding the Fourth Proportional to 12,861.08, 17,750.20 and 8,145.80

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Solution

The fourth proportional to 12,861.08, 17,750.20 and 8,145.80 is: 11,242.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,861.08 : 17,750.20 = 8,145.80 : x
  2. Step 2: Convert to fraction form
    12,861.08/17,750.20 = 8,145.80/x
  3. Step 3: Cross multiply
    12,861.08x = 17,750.20 × 8,145.80
  4. Step 4: Simplify right side
    12,861.08x = 144,589,579.16
  5. Step 5: Solve for x
    x = 144,589,579.16/12,861.08
  6. Step 6: Final answer
    x = 11,242.41

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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.