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Finding the Fourth Proportional to 7,756.70, 10,704.12 and 4,219.98

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Solution

The fourth proportional to 7,756.70, 10,704.12 and 4,219.98 is: 5,823.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,756.70 : 10,704.12 = 4,219.98 : x
  2. Step 2: Convert to fraction form
    7,756.70/10,704.12 = 4,219.98/x
  3. Step 3: Cross multiply
    7,756.70x = 10,704.12 × 4,219.98
  4. Step 4: Simplify right side
    7,756.70x = 45,171,172.32
  5. Step 5: Solve for x
    x = 45,171,172.32/7,756.70
  6. Step 6: Final answer
    x = 5,823.50

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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.