Home / 28,515.30-39,351.21-15,940.05

Finding the Fourth Proportional to 28,515.30, 39,351.21 and 15,940.05

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Solution

The fourth proportional to 28,515.30, 39,351.21 and 15,940.05 is: 21,997.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.30 : 39,351.21 = 15,940.05 : x
  2. Step 2: Convert to fraction form
    28,515.30/39,351.21 = 15,940.05/x
  3. Step 3: Cross multiply
    28,515.30x = 39,351.21 × 15,940.05
  4. Step 4: Simplify right side
    28,515.30x = 627,260,254.96
  5. Step 5: Solve for x
    x = 627,260,254.96/28,515.30
  6. Step 6: Final answer
    x = 21,997.32

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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.