Home / 13,083.89-18,055.60-7,115.43

Finding the Fourth Proportional to 13,083.89, 18,055.60 and 7,115.43

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Solution

The fourth proportional to 13,083.89, 18,055.60 and 7,115.43 is: 9,819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,083.89 : 18,055.60 = 7,115.43 : x
  2. Step 2: Convert to fraction form
    13,083.89/18,055.60 = 7,115.43/x
  3. Step 3: Cross multiply
    13,083.89x = 18,055.60 × 7,115.43
  4. Step 4: Simplify right side
    13,083.89x = 128,473,322.33
  5. Step 5: Solve for x
    x = 128,473,322.33/13,083.89
  6. Step 6: Final answer
    x = 9,819.20

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Half scale
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Double scale
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Similar ratio
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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.