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Finding the Fourth Proportional to 13,160.40, 19,740.60 and 7,611.60

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Solution

The fourth proportional to 13,160.40, 19,740.60 and 7,611.60 is: 11,417.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,160.40 : 19,740.60 = 7,611.60 : x
  2. Step 2: Convert to fraction form
    13,160.40/19,740.60 = 7,611.60/x
  3. Step 3: Cross multiply
    13,160.40x = 19,740.60 × 7,611.60
  4. Step 4: Simplify right side
    13,160.40x = 150,257,550.96
  5. Step 5: Solve for x
    x = 150,257,550.96/13,160.40
  6. Step 6: Final answer
    x = 11,417.40

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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.