Home / 3,928.96-5,421.90-2,603.60

Finding the Fourth Proportional to 3,928.96, 5,421.90 and 2,603.60

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Solution

The fourth proportional to 3,928.96, 5,421.90 and 2,603.60 is: 3,592.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.96 : 5,421.90 = 2,603.60 : x
  2. Step 2: Convert to fraction form
    3,928.96/5,421.90 = 2,603.60/x
  3. Step 3: Cross multiply
    3,928.96x = 5,421.90 × 2,603.60
  4. Step 4: Simplify right side
    3,928.96x = 14,116,458.84
  5. Step 5: Solve for x
    x = 14,116,458.84/3,928.96
  6. Step 6: Final answer
    x = 3,592.93

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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.