Home / 3,855.18-5,315.30-3,146.30

Finding the Fourth Proportional to 3,855.18, 5,315.30 and 3,146.30

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Solution

The fourth proportional to 3,855.18, 5,315.30 and 3,146.30 is: 4,337.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.18 : 5,315.30 = 3,146.30 : x
  2. Step 2: Convert to fraction form
    3,855.18/5,315.30 = 3,146.30/x
  3. Step 3: Cross multiply
    3,855.18x = 5,315.30 × 3,146.30
  4. Step 4: Simplify right side
    3,855.18x = 16,723,501.81
  5. Step 5: Solve for x
    x = 16,723,501.81/3,855.18
  6. Step 6: Final answer
    x = 4,337.93

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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.