Home / 12,120.08-18,133.52-7,439.09

Finding the Fourth Proportional to 12,120.08, 18,133.52 and 7,439.09

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Solution

The fourth proportional to 12,120.08, 18,133.52 and 7,439.09 is: 11,130.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.08 : 18,133.52 = 7,439.09 : x
  2. Step 2: Convert to fraction form
    12,120.08/18,133.52 = 7,439.09/x
  3. Step 3: Cross multiply
    12,120.08x = 18,133.52 × 7,439.09
  4. Step 4: Simplify right side
    12,120.08x = 134,896,759.43
  5. Step 5: Solve for x
    x = 134,896,759.43/12,120.08
  6. Step 6: Final answer
    x = 11,130.03

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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.