Home / 12,005.53-18,011.34-3,685.97

Finding the Fourth Proportional to 12,005.53, 18,011.34 and 3,685.97

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Solution

The fourth proportional to 12,005.53, 18,011.34 and 3,685.97 is: 5,529.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,005.53 : 18,011.34 = 3,685.97 : x
  2. Step 2: Convert to fraction form
    12,005.53/18,011.34 = 3,685.97/x
  3. Step 3: Cross multiply
    12,005.53x = 18,011.34 × 3,685.97
  4. Step 4: Simplify right side
    12,005.53x = 66,389,258.90
  5. Step 5: Solve for x
    x = 66,389,258.90/12,005.53
  6. Step 6: Final answer
    x = 5,529.89

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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.