Home / 11,157.81-15,397.71-6,121.90

Finding the Fourth Proportional to 11,157.81, 15,397.71 and 6,121.90

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Solution

The fourth proportional to 11,157.81, 15,397.71 and 6,121.90 is: 8,448.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,157.81 : 15,397.71 = 6,121.90 : x
  2. Step 2: Convert to fraction form
    11,157.81/15,397.71 = 6,121.90/x
  3. Step 3: Cross multiply
    11,157.81x = 15,397.71 × 6,121.90
  4. Step 4: Simplify right side
    11,157.81x = 94,263,240.85
  5. Step 5: Solve for x
    x = 94,263,240.85/11,157.81
  6. Step 6: Final answer
    x = 8,448.18

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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.