Home / 3,973.78-5,478.60-3,420.19

Finding the Fourth Proportional to 3,973.78, 5,478.60 and 3,420.19

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Solution

The fourth proportional to 3,973.78, 5,478.60 and 3,420.19 is: 4,715.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,973.78 : 5,478.60 = 3,420.19 : x
  2. Step 2: Convert to fraction form
    3,973.78/5,478.60 = 3,420.19/x
  3. Step 3: Cross multiply
    3,973.78x = 5,478.60 × 3,420.19
  4. Step 4: Simplify right side
    3,973.78x = 18,737,852.93
  5. Step 5: Solve for x
    x = 18,737,852.93/3,973.78
  6. Step 6: Final answer
    x = 4,715.37

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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.