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Finding the Fourth Proportional to 5,281.57, 7,915.73 and 4,621.88

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Solution

The fourth proportional to 5,281.57, 7,915.73 and 4,621.88 is: 6,927.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,281.57 : 7,915.73 = 4,621.88 : x
  2. Step 2: Convert to fraction form
    5,281.57/7,915.73 = 4,621.88/x
  3. Step 3: Cross multiply
    5,281.57x = 7,915.73 × 4,621.88
  4. Step 4: Simplify right side
    5,281.57x = 36,585,506.33
  5. Step 5: Solve for x
    x = 36,585,506.33/5,281.57
  6. Step 6: Final answer
    x = 6,927.01

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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.