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Finding the Fourth Proportional to 8,718.64, 13,068.78 and 2,873.68

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Solution

The fourth proportional to 8,718.64, 13,068.78 and 2,873.68 is: 4,307.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.64 : 13,068.78 = 2,873.68 : x
  2. Step 2: Convert to fraction form
    8,718.64/13,068.78 = 2,873.68/x
  3. Step 3: Cross multiply
    8,718.64x = 13,068.78 × 2,873.68
  4. Step 4: Simplify right side
    8,718.64x = 37,555,491.71
  5. Step 5: Solve for x
    x = 37,555,491.71/8,718.64
  6. Step 6: Final answer
    x = 4,307.49

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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.