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Finding the Fourth Proportional to 8,718.71, 13,078.41 and 4,555.89

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Solution

The fourth proportional to 8,718.71, 13,078.41 and 4,555.89 is: 6,834.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.71 : 13,078.41 = 4,555.89 : x
  2. Step 2: Convert to fraction form
    8,718.71/13,078.41 = 4,555.89/x
  3. Step 3: Cross multiply
    8,718.71x = 13,078.41 × 4,555.89
  4. Step 4: Simplify right side
    8,718.71x = 59,583,780.25
  5. Step 5: Solve for x
    x = 59,583,780.25/8,718.71
  6. Step 6: Final answer
    x = 6,834.01

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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.