Home / 28,905.81-43,357.72-12,255.12

Finding the Fourth Proportional to 28,905.81, 43,357.72 and 12,255.12

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Solution

The fourth proportional to 28,905.81, 43,357.72 and 12,255.12 is: 18,382.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,905.81 : 43,357.72 = 12,255.12 : x
  2. Step 2: Convert to fraction form
    28,905.81/43,357.72 = 12,255.12/x
  3. Step 3: Cross multiply
    28,905.81x = 43,357.72 × 12,255.12
  4. Step 4: Simplify right side
    28,905.81x = 531,353,814.10
  5. Step 5: Solve for x
    x = 531,353,814.10/28,905.81
  6. Step 6: Final answer
    x = 18,382.25

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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.