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Finding the Fourth Proportional to 28,858.92, 39,825.93 and 15,938.15

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Solution

The fourth proportional to 28,858.92, 39,825.93 and 15,938.15 is: 21,994.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,858.92 : 39,825.93 = 15,938.15 : x
  2. Step 2: Convert to fraction form
    28,858.92/39,825.93 = 15,938.15/x
  3. Step 3: Cross multiply
    28,858.92x = 39,825.93 × 15,938.15
  4. Step 4: Simplify right side
    28,858.92x = 634,751,566.54
  5. Step 5: Solve for x
    x = 634,751,566.54/28,858.92
  6. Step 6: Final answer
    x = 21,994.99

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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.