Home / 28,515.84-39,353.04-15,940.56

Finding the Fourth Proportional to 28,515.84, 39,353.04 and 15,940.56

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Solution

The fourth proportional to 28,515.84, 39,353.04 and 15,940.56 is: 21,998.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.84 : 39,353.04 = 15,940.56 : x
  2. Step 2: Convert to fraction form
    28,515.84/39,353.04 = 15,940.56/x
  3. Step 3: Cross multiply
    28,515.84x = 39,353.04 × 15,940.56
  4. Step 4: Simplify right side
    28,515.84x = 627,309,495.30
  5. Step 5: Solve for x
    x = 627,309,495.30/28,515.84
  6. Step 6: Final answer
    x = 21,998.63

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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.