Home / 3,928.23-5,420.96-2,159.84

Finding the Fourth Proportional to 3,928.23, 5,420.96 and 2,159.84

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Solution

The fourth proportional to 3,928.23, 5,420.96 and 2,159.84 is: 2,980.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.23 : 5,420.96 = 2,159.84 : x
  2. Step 2: Convert to fraction form
    3,928.23/5,420.96 = 2,159.84/x
  3. Step 3: Cross multiply
    3,928.23x = 5,420.96 × 2,159.84
  4. Step 4: Simplify right side
    3,928.23x = 11,708,368.34
  5. Step 5: Solve for x
    x = 11,708,368.34/3,928.23
  6. Step 6: Final answer
    x = 2,980.57

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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.