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Finding the Fourth Proportional to 6,611.32, 9,918.48 and 3,840.30

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Solution

The fourth proportional to 6,611.32, 9,918.48 and 3,840.30 is: 5,761.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,611.32 : 9,918.48 = 3,840.30 : x
  2. Step 2: Convert to fraction form
    6,611.32/9,918.48 = 3,840.30/x
  3. Step 3: Cross multiply
    6,611.32x = 9,918.48 × 3,840.30
  4. Step 4: Simplify right side
    6,611.32x = 38,089,938.74
  5. Step 5: Solve for x
    x = 38,089,938.74/6,611.32
  6. Step 6: Final answer
    x = 5,761.32

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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.