Home / 3,928.02-5,420.44-2,159.52

Finding the Fourth Proportional to 3,928.02, 5,420.44 and 2,159.52

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Solution

The fourth proportional to 3,928.02, 5,420.44 and 2,159.52 is: 2,980.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.02 : 5,420.44 = 2,159.52 : x
  2. Step 2: Convert to fraction form
    3,928.02/5,420.44 = 2,159.52/x
  3. Step 3: Cross multiply
    3,928.02x = 5,420.44 × 2,159.52
  4. Step 4: Simplify right side
    3,928.02x = 11,705,548.59
  5. Step 5: Solve for x
    x = 11,705,548.59/3,928.02
  6. Step 6: Final answer
    x = 2,980.01

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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.