Home / 12,133.24-18,207.62-7,981.60

Finding the Fourth Proportional to 12,133.24, 18,207.62 and 7,981.60

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Solution

The fourth proportional to 12,133.24, 18,207.62 and 7,981.60 is: 11,977.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,133.24 : 18,207.62 = 7,981.60 : x
  2. Step 2: Convert to fraction form
    12,133.24/18,207.62 = 7,981.60/x
  3. Step 3: Cross multiply
    12,133.24x = 18,207.62 × 7,981.60
  4. Step 4: Simplify right side
    12,133.24x = 145,325,939.79
  5. Step 5: Solve for x
    x = 145,325,939.79/12,133.24
  6. Step 6: Final answer
    x = 11,977.50

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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.