Home / 28,912.08-39,891.52-18,158.72

Finding the Fourth Proportional to 28,912.08, 39,891.52 and 18,158.72

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Solution

The fourth proportional to 28,912.08, 39,891.52 and 18,158.72 is: 25,054.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,912.08 : 39,891.52 = 18,158.72 : x
  2. Step 2: Convert to fraction form
    28,912.08/39,891.52 = 18,158.72/x
  3. Step 3: Cross multiply
    28,912.08x = 39,891.52 × 18,158.72
  4. Step 4: Simplify right side
    28,912.08x = 724,378,942.05
  5. Step 5: Solve for x
    x = 724,378,942.05/28,912.08
  6. Step 6: Final answer
    x = 25,054.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.