Home / 11,138.19-15,368.16-6,661.18

Finding the Fourth Proportional to 11,138.19, 15,368.16 and 6,661.18

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Solution

The fourth proportional to 11,138.19, 15,368.16 and 6,661.18 is: 9,190.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,138.19 : 15,368.16 = 6,661.18 : x
  2. Step 2: Convert to fraction form
    11,138.19/15,368.16 = 6,661.18/x
  3. Step 3: Cross multiply
    11,138.19x = 15,368.16 × 6,661.18
  4. Step 4: Simplify right side
    11,138.19x = 102,370,080.03
  5. Step 5: Solve for x
    x = 102,370,080.03/11,138.19
  6. Step 6: Final answer
    x = 9,190.91

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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.