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Finding the Fourth Proportional to 8,740.40, 13,110.60 and 8,361.20

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Solution

The fourth proportional to 8,740.40, 13,110.60 and 8,361.20 is: 12,541.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,740.40 : 13,110.60 = 8,361.20 : x
  2. Step 2: Convert to fraction form
    8,740.40/13,110.60 = 8,361.20/x
  3. Step 3: Cross multiply
    8,740.40x = 13,110.60 × 8,361.20
  4. Step 4: Simplify right side
    8,740.40x = 109,620,348.72
  5. Step 5: Solve for x
    x = 109,620,348.72/8,740.40
  6. Step 6: Final answer
    x = 12,541.80

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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.