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Finding the Fourth Proportional to 8,370.40, 12,555.60 and 3,175.60

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Solution

The fourth proportional to 8,370.40, 12,555.60 and 3,175.60 is: 4,763.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,370.40 : 12,555.60 = 3,175.60 : x
  2. Step 2: Convert to fraction form
    8,370.40/12,555.60 = 3,175.60/x
  3. Step 3: Cross multiply
    8,370.40x = 12,555.60 × 3,175.60
  4. Step 4: Simplify right side
    8,370.40x = 39,871,563.36
  5. Step 5: Solve for x
    x = 39,871,563.36/8,370.40
  6. Step 6: Final answer
    x = 4,763.40

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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.