Home / 12,225.50-18,338.09-3,905.40

Finding the Fourth Proportional to 12,225.50, 18,338.09 and 3,905.40

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Solution

The fourth proportional to 12,225.50, 18,338.09 and 3,905.40 is: 5,858.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,225.50 : 18,338.09 = 3,905.40 : x
  2. Step 2: Convert to fraction form
    12,225.50/18,338.09 = 3,905.40/x
  3. Step 3: Cross multiply
    12,225.50x = 18,338.09 × 3,905.40
  4. Step 4: Simplify right side
    12,225.50x = 71,617,576.69
  5. Step 5: Solve for x
    x = 71,617,576.69/12,225.50
  6. Step 6: Final answer
    x = 5,858.05

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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.