Home / 13,083.39-18,055.41-7,115.40

Finding the Fourth Proportional to 13,083.39, 18,055.41 and 7,115.40

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Solution

The fourth proportional to 13,083.39, 18,055.41 and 7,115.40 is: 9,819.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,083.39 : 18,055.41 = 7,115.40 : x
  2. Step 2: Convert to fraction form
    13,083.39/18,055.41 = 7,115.40/x
  3. Step 3: Cross multiply
    13,083.39x = 18,055.41 × 7,115.40
  4. Step 4: Simplify right side
    13,083.39x = 128,471,464.31
  5. Step 5: Solve for x
    x = 128,471,464.31/13,083.39
  6. Step 6: Final answer
    x = 9,819.43

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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.