Home / 28,331.96-39,114.12-21,564.44

Finding the Fourth Proportional to 28,331.96, 39,114.12 and 21,564.44

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Solution

The fourth proportional to 28,331.96, 39,114.12 and 21,564.44 is: 29,771.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,331.96 : 39,114.12 = 21,564.44 : x
  2. Step 2: Convert to fraction form
    28,331.96/39,114.12 = 21,564.44/x
  3. Step 3: Cross multiply
    28,331.96x = 39,114.12 × 21,564.44
  4. Step 4: Simplify right side
    28,331.96x = 843,474,093.89
  5. Step 5: Solve for x
    x = 843,474,093.89/28,331.96
  6. Step 6: Final answer
    x = 29,771.12

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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.