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Finding the Fourth Proportional to 8,915.78, 13,364.76 and 3,068.40

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Solution

The fourth proportional to 8,915.78, 13,364.76 and 3,068.40 is: 4,599.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.78 : 13,364.76 = 3,068.40 : x
  2. Step 2: Convert to fraction form
    8,915.78/13,364.76 = 3,068.40/x
  3. Step 3: Cross multiply
    8,915.78x = 13,364.76 × 3,068.40
  4. Step 4: Simplify right side
    8,915.78x = 41,008,429.58
  5. Step 5: Solve for x
    x = 41,008,429.58/8,915.78
  6. Step 6: Final answer
    x = 4,599.53

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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.