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Finding the Fourth Proportional to 8,611.74, 11,880.72 and 5,419.41

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Solution

The fourth proportional to 8,611.74, 11,880.72 and 5,419.41 is: 7,476.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,611.74 : 11,880.72 = 5,419.41 : x
  2. Step 2: Convert to fraction form
    8,611.74/11,880.72 = 5,419.41/x
  3. Step 3: Cross multiply
    8,611.74x = 11,880.72 × 5,419.41
  4. Step 4: Simplify right side
    8,611.74x = 64,386,492.78
  5. Step 5: Solve for x
    x = 64,386,492.78/8,611.74
  6. Step 6: Final answer
    x = 7,476.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.