Home / 13,081.18-18,051.84-7,112.68

Finding the Fourth Proportional to 13,081.18, 18,051.84 and 7,112.68

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Solution

The fourth proportional to 13,081.18, 18,051.84 and 7,112.68 is: 9,815.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,081.18 : 18,051.84 = 7,112.68 : x
  2. Step 2: Convert to fraction form
    13,081.18/18,051.84 = 7,112.68/x
  3. Step 3: Cross multiply
    13,081.18x = 18,051.84 × 7,112.68
  4. Step 4: Simplify right side
    13,081.18x = 128,396,961.33
  5. Step 5: Solve for x
    x = 128,396,961.33/13,081.18
  6. Step 6: Final answer
    x = 9,815.40

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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.