Home / 3,603.40-5,415.90-3,128.20

Finding the Fourth Proportional to 3,603.40, 5,415.90 and 3,128.20

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Solution

The fourth proportional to 3,603.40, 5,415.90 and 3,128.20 is: 4,701.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,603.40 : 5,415.90 = 3,128.20 : x
  2. Step 2: Convert to fraction form
    3,603.40/5,415.90 = 3,128.20/x
  3. Step 3: Cross multiply
    3,603.40x = 5,415.90 × 3,128.20
  4. Step 4: Simplify right side
    3,603.40x = 16,942,018.38
  5. Step 5: Solve for x
    x = 16,942,018.38/3,603.40
  6. Step 6: Final answer
    x = 4,701.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.