Home / 28,163.44-38,865-15,588.28

Finding the Fourth Proportional to 28,163.44, 38,865 and 15,588.28

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Solution

The fourth proportional to 28,163.44, 38,865 and 15,588.28 is: 21,511.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,163.44 : 38,865 = 15,588.28 : x
  2. Step 2: Convert to fraction form
    28,163.44/38,865 = 15,588.28/x
  3. Step 3: Cross multiply
    28,163.44x = 38,865 × 15,588.28
  4. Step 4: Simplify right side
    28,163.44x = 605,838,502.20
  5. Step 5: Solve for x
    x = 605,838,502.20/28,163.44
  6. Step 6: Final answer
    x = 21,511.52

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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.