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Finding the Fourth Proportional to 8,651.71, 12,973.11 and 2,807.56

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Solution

The fourth proportional to 8,651.71, 12,973.11 and 2,807.56 is: 4,209.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,651.71 : 12,973.11 = 2,807.56 : x
  2. Step 2: Convert to fraction form
    8,651.71/12,973.11 = 2,807.56/x
  3. Step 3: Cross multiply
    8,651.71x = 12,973.11 × 2,807.56
  4. Step 4: Simplify right side
    8,651.71x = 36,422,784.71
  5. Step 5: Solve for x
    x = 36,422,784.71/8,651.71
  6. Step 6: Final answer
    x = 4,209.89

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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.