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Finding the Fourth Proportional to 13,083.68, 18,055.68 and 7,115.60

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Solution

The fourth proportional to 13,083.68, 18,055.68 and 7,115.60 is: 9,819.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,083.68 : 18,055.68 = 7,115.60 : x
  2. Step 2: Convert to fraction form
    13,083.68/18,055.68 = 7,115.60/x
  3. Step 3: Cross multiply
    13,083.68x = 18,055.68 × 7,115.60
  4. Step 4: Simplify right side
    13,083.68x = 128,476,996.61
  5. Step 5: Solve for x
    x = 128,476,996.61/13,083.68
  6. Step 6: Final answer
    x = 9,819.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.