Home / 7,618.85-11,428.78-2,938.90

Finding the Fourth Proportional to 7,618.85, 11,428.78 and 2,938.90

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Solution

The fourth proportional to 7,618.85, 11,428.78 and 2,938.90 is: 4,408.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,618.85 : 11,428.78 = 2,938.90 : x
  2. Step 2: Convert to fraction form
    7,618.85/11,428.78 = 2,938.90/x
  3. Step 3: Cross multiply
    7,618.85x = 11,428.78 × 2,938.90
  4. Step 4: Simplify right side
    7,618.85x = 33,588,041.54
  5. Step 5: Solve for x
    x = 33,588,041.54/7,618.85
  6. Step 6: Final answer
    x = 4,408.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.