Home / 5,638.40-8,455.53-1,939.58

Finding the Fourth Proportional to 5,638.40, 8,455.53 and 1,939.58

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Solution

The fourth proportional to 5,638.40, 8,455.53 and 1,939.58 is: 2,908.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.40 : 8,455.53 = 1,939.58 : x
  2. Step 2: Convert to fraction form
    5,638.40/8,455.53 = 1,939.58/x
  3. Step 3: Cross multiply
    5,638.40x = 8,455.53 × 1,939.58
  4. Step 4: Simplify right side
    5,638.40x = 16,400,176.88
  5. Step 5: Solve for x
    x = 16,400,176.88/5,638.40
  6. Step 6: Final answer
    x = 2,908.66

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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.