Home / 12,115.09-18,154.07-8,151.65

Finding the Fourth Proportional to 12,115.09, 18,154.07 and 8,151.65

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Solution

The fourth proportional to 12,115.09, 18,154.07 and 8,151.65 is: 12,215.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115.09 : 18,154.07 = 8,151.65 : x
  2. Step 2: Convert to fraction form
    12,115.09/18,154.07 = 8,151.65/x
  3. Step 3: Cross multiply
    12,115.09x = 18,154.07 × 8,151.65
  4. Step 4: Simplify right side
    12,115.09x = 147,985,739.80
  5. Step 5: Solve for x
    x = 147,985,739.80/12,115.09
  6. Step 6: Final answer
    x = 12,215.00

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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.