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Finding the Fourth Proportional to 4,947.72, 7,420.21 and 3,556.93

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Solution

The fourth proportional to 4,947.72, 7,420.21 and 3,556.93 is: 5,334.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,947.72 : 7,420.21 = 3,556.93 : x
  2. Step 2: Convert to fraction form
    4,947.72/7,420.21 = 3,556.93/x
  3. Step 3: Cross multiply
    4,947.72x = 7,420.21 × 3,556.93
  4. Step 4: Simplify right side
    4,947.72x = 26,393,167.56
  5. Step 5: Solve for x
    x = 26,393,167.56/4,947.72
  6. Step 6: Final answer
    x = 5,334.41

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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.