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Finding the Fourth Proportional to 8,649.51, 12,973.05 and 4,939.71

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Solution

The fourth proportional to 8,649.51, 12,973.05 and 4,939.71 is: 7,408.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,649.51 : 12,973.05 = 4,939.71 : x
  2. Step 2: Convert to fraction form
    8,649.51/12,973.05 = 4,939.71/x
  3. Step 3: Cross multiply
    8,649.51x = 12,973.05 × 4,939.71
  4. Step 4: Simplify right side
    8,649.51x = 64,083,104.82
  5. Step 5: Solve for x
    x = 64,083,104.82/8,649.51
  6. Step 6: Final answer
    x = 7,408.87

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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.