Home / 3,420.05-5,130.54-1,571.13

Finding the Fourth Proportional to 3,420.05, 5,130.54 and 1,571.13

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Solution

The fourth proportional to 3,420.05, 5,130.54 and 1,571.13 is: 2,356.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.05 : 5,130.54 = 1,571.13 : x
  2. Step 2: Convert to fraction form
    3,420.05/5,130.54 = 1,571.13/x
  3. Step 3: Cross multiply
    3,420.05x = 5,130.54 × 1,571.13
  4. Step 4: Simplify right side
    3,420.05x = 8,060,745.31
  5. Step 5: Solve for x
    x = 8,060,745.31/3,420.05
  6. Step 6: Final answer
    x = 2,356.91

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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.