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Finding the Fourth Proportional to 8,600.40, 12,890.52 and 3,973.68

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Solution

The fourth proportional to 8,600.40, 12,890.52 and 3,973.68 is: 5,955.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,600.40 : 12,890.52 = 3,973.68 : x
  2. Step 2: Convert to fraction form
    8,600.40/12,890.52 = 3,973.68/x
  3. Step 3: Cross multiply
    8,600.40x = 12,890.52 × 3,973.68
  4. Step 4: Simplify right side
    8,600.40x = 51,222,801.51
  5. Step 5: Solve for x
    x = 51,222,801.51/8,600.40
  6. Step 6: Final answer
    x = 5,955.86

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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.