Home / 3,638.88-5,457.60-2,178.72

Finding the Fourth Proportional to 3,638.88, 5,457.60 and 2,178.72

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Solution

The fourth proportional to 3,638.88, 5,457.60 and 2,178.72 is: 3,267.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,638.88 : 5,457.60 = 2,178.72 : x
  2. Step 2: Convert to fraction form
    3,638.88/5,457.60 = 2,178.72/x
  3. Step 3: Cross multiply
    3,638.88x = 5,457.60 × 2,178.72
  4. Step 4: Simplify right side
    3,638.88x = 11,890,582.27
  5. Step 5: Solve for x
    x = 11,890,582.27/3,638.88
  6. Step 6: Final answer
    x = 3,267.65

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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.