Home / 3,928.19-5,420.93-2,159.91

Finding the Fourth Proportional to 3,928.19, 5,420.93 and 2,159.91

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Solution

The fourth proportional to 3,928.19, 5,420.93 and 2,159.91 is: 2,980.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.19 : 5,420.93 = 2,159.91 : x
  2. Step 2: Convert to fraction form
    3,928.19/5,420.93 = 2,159.91/x
  3. Step 3: Cross multiply
    3,928.19x = 5,420.93 × 2,159.91
  4. Step 4: Simplify right side
    3,928.19x = 11,708,729.07
  5. Step 5: Solve for x
    x = 11,708,729.07/3,928.19
  6. Step 6: Final answer
    x = 2,980.69

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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.