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Finding the Fourth Proportional to 12,893.60, 19,335.60 and 5,100.80

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Solution

The fourth proportional to 12,893.60, 19,335.60 and 5,100.80 is: 7,649.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,893.60 : 19,335.60 = 5,100.80 : x
  2. Step 2: Convert to fraction form
    12,893.60/19,335.60 = 5,100.80/x
  3. Step 3: Cross multiply
    12,893.60x = 19,335.60 × 5,100.80
  4. Step 4: Simplify right side
    12,893.60x = 98,627,028.48
  5. Step 5: Solve for x
    x = 98,627,028.48/12,893.60
  6. Step 6: Final answer
    x = 7,649.30

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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.