Home / 12,085.12-18,120.36-5,516.80

Finding the Fourth Proportional to 12,085.12, 18,120.36 and 5,516.80

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Solution

The fourth proportional to 12,085.12, 18,120.36 and 5,516.80 is: 8,271.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,085.12 : 18,120.36 = 5,516.80 : x
  2. Step 2: Convert to fraction form
    12,085.12/18,120.36 = 5,516.80/x
  3. Step 3: Cross multiply
    12,085.12x = 18,120.36 × 5,516.80
  4. Step 4: Simplify right side
    12,085.12x = 99,966,402.05
  5. Step 5: Solve for x
    x = 99,966,402.05/12,085.12
  6. Step 6: Final answer
    x = 8,271.86

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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.