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Finding the Fourth Proportional to 8,245.70, 12,368.55 and 3,312.80

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Solution

The fourth proportional to 8,245.70, 12,368.55 and 3,312.80 is: 4,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,245.70 : 12,368.55 = 3,312.80 : x
  2. Step 2: Convert to fraction form
    8,245.70/12,368.55 = 3,312.80/x
  3. Step 3: Cross multiply
    8,245.70x = 12,368.55 × 3,312.80
  4. Step 4: Simplify right side
    8,245.70x = 40,974,532.44
  5. Step 5: Solve for x
    x = 40,974,532.44/8,245.70
  6. Step 6: Final answer
    x = 4,969.20

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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.