Home / 28,485.54-42,743.61-11,857.05

Finding the Fourth Proportional to 28,485.54, 42,743.61 and 11,857.05

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Solution

The fourth proportional to 28,485.54, 42,743.61 and 11,857.05 is: 17,791.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,485.54 : 42,743.61 = 11,857.05 : x
  2. Step 2: Convert to fraction form
    28,485.54/42,743.61 = 11,857.05/x
  3. Step 3: Cross multiply
    28,485.54x = 42,743.61 × 11,857.05
  4. Step 4: Simplify right side
    28,485.54x = 506,813,120.95
  5. Step 5: Solve for x
    x = 506,813,120.95/28,485.54
  6. Step 6: Final answer
    x = 17,791.94

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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.