Home / 3,928.43-5,421.23-2,160.03

Finding the Fourth Proportional to 3,928.43, 5,421.23 and 2,160.03

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Solution

The fourth proportional to 3,928.43, 5,421.23 and 2,160.03 is: 2,980.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.43 : 5,421.23 = 2,160.03 : x
  2. Step 2: Convert to fraction form
    3,928.43/5,421.23 = 2,160.03/x
  3. Step 3: Cross multiply
    3,928.43x = 5,421.23 × 2,160.03
  4. Step 4: Simplify right side
    3,928.43x = 11,710,008.64
  5. Step 5: Solve for x
    x = 11,710,008.64/3,928.43
  6. Step 6: Final answer
    x = 2,980.84

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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.