Home / 28,912.07-39,905.33-18,822.95

Finding the Fourth Proportional to 28,912.07, 39,905.33 and 18,822.95

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Solution

The fourth proportional to 28,912.07, 39,905.33 and 18,822.95 is: 25,980.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,912.07 : 39,905.33 = 18,822.95 : x
  2. Step 2: Convert to fraction form
    28,912.07/39,905.33 = 18,822.95/x
  3. Step 3: Cross multiply
    28,912.07x = 39,905.33 × 18,822.95
  4. Step 4: Simplify right side
    28,912.07x = 751,135,737.68
  5. Step 5: Solve for x
    x = 751,135,737.68/28,912.07
  6. Step 6: Final answer
    x = 25,980.01

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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.