Home / 3,905.38-5,386.60-2,487.67

Finding the Fourth Proportional to 3,905.38, 5,386.60 and 2,487.67

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Solution

The fourth proportional to 3,905.38, 5,386.60 and 2,487.67 is: 3,431.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.38 : 5,386.60 = 2,487.67 : x
  2. Step 2: Convert to fraction form
    3,905.38/5,386.60 = 2,487.67/x
  3. Step 3: Cross multiply
    3,905.38x = 5,386.60 × 2,487.67
  4. Step 4: Simplify right side
    3,905.38x = 13,400,083.22
  5. Step 5: Solve for x
    x = 13,400,083.22/3,905.38
  6. Step 6: Final answer
    x = 3,431.19

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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.