Home / 28,431.68-39,235.62-15,856.42

Finding the Fourth Proportional to 28,431.68, 39,235.62 and 15,856.42

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Solution

The fourth proportional to 28,431.68, 39,235.62 and 15,856.42 is: 21,881.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.68 : 39,235.62 = 15,856.42 : x
  2. Step 2: Convert to fraction form
    28,431.68/39,235.62 = 15,856.42/x
  3. Step 3: Cross multiply
    28,431.68x = 39,235.62 × 15,856.42
  4. Step 4: Simplify right side
    28,431.68x = 622,136,469.68
  5. Step 5: Solve for x
    x = 622,136,469.68/28,431.68
  6. Step 6: Final answer
    x = 21,881.80

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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.