Home / 28,163.37-38,865.86-15,588.12

Finding the Fourth Proportional to 28,163.37, 38,865.86 and 15,588.12

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Solution

The fourth proportional to 28,163.37, 38,865.86 and 15,588.12 is: 21,511.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,163.37 : 38,865.86 = 15,588.12 : x
  2. Step 2: Convert to fraction form
    28,163.37/38,865.86 = 15,588.12/x
  3. Step 3: Cross multiply
    28,163.37x = 38,865.86 × 15,588.12
  4. Step 4: Simplify right side
    28,163.37x = 605,845,689.58
  5. Step 5: Solve for x
    x = 605,845,689.58/28,163.37
  6. Step 6: Final answer
    x = 21,511.83

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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.