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Finding the Fourth Proportional to 6,348.61, 8,756.99 and 3,986.65

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Solution

The fourth proportional to 6,348.61, 8,756.99 and 3,986.65 is: 5,499.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,348.61 : 8,756.99 = 3,986.65 : x
  2. Step 2: Convert to fraction form
    6,348.61/8,756.99 = 3,986.65/x
  3. Step 3: Cross multiply
    6,348.61x = 8,756.99 × 3,986.65
  4. Step 4: Simplify right side
    6,348.61x = 34,911,010.40
  5. Step 5: Solve for x
    x = 34,911,010.40/6,348.61
  6. Step 6: Final answer
    x = 5,499.00

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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.