Home / 28,512.98-39,346.31-15,765.42

Finding the Fourth Proportional to 28,512.98, 39,346.31 and 15,765.42

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Solution

The fourth proportional to 28,512.98, 39,346.31 and 15,765.42 is: 21,755.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512.98 : 39,346.31 = 15,765.42 : x
  2. Step 2: Convert to fraction form
    28,512.98/39,346.31 = 15,765.42/x
  3. Step 3: Cross multiply
    28,512.98x = 39,346.31 × 15,765.42
  4. Step 4: Simplify right side
    28,512.98x = 620,311,142.01
  5. Step 5: Solve for x
    x = 620,311,142.01/28,512.98
  6. Step 6: Final answer
    x = 21,755.40

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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.