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Finding the Fourth Proportional to 6,404.55, 8,839.95 and 4,172.55

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Solution

The fourth proportional to 6,404.55, 8,839.95 and 4,172.55 is: 5,759.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,404.55 : 8,839.95 = 4,172.55 : x
  2. Step 2: Convert to fraction form
    6,404.55/8,839.95 = 4,172.55/x
  3. Step 3: Cross multiply
    6,404.55x = 8,839.95 × 4,172.55
  4. Step 4: Simplify right side
    6,404.55x = 36,885,133.37
  5. Step 5: Solve for x
    x = 36,885,133.37/6,404.55
  6. Step 6: Final answer
    x = 5,759.21

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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.