Home / 12,109.08-18,147.69-11,319.87

Finding the Fourth Proportional to 12,109.08, 18,147.69 and 11,319.87

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Solution

The fourth proportional to 12,109.08, 18,147.69 and 11,319.87 is: 16,964.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,109.08 : 18,147.69 = 11,319.87 : x
  2. Step 2: Convert to fraction form
    12,109.08/18,147.69 = 11,319.87/x
  3. Step 3: Cross multiply
    12,109.08x = 18,147.69 × 11,319.87
  4. Step 4: Simplify right side
    12,109.08x = 205,429,491.60
  5. Step 5: Solve for x
    x = 205,429,491.60/12,109.08
  6. Step 6: Final answer
    x = 16,964.91

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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.