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Finding the Fourth Proportional to 8,622.81, 12,935.57 and 2,780.01

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Solution

The fourth proportional to 8,622.81, 12,935.57 and 2,780.01 is: 4,170.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,622.81 : 12,935.57 = 2,780.01 : x
  2. Step 2: Convert to fraction form
    8,622.81/12,935.57 = 2,780.01/x
  3. Step 3: Cross multiply
    8,622.81x = 12,935.57 × 2,780.01
  4. Step 4: Simplify right side
    8,622.81x = 35,961,000.06
  5. Step 5: Solve for x
    x = 35,961,000.06/8,622.81
  6. Step 6: Final answer
    x = 4,170.45

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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.