Home / 7,112.21-9,814.82-4,128.62

Finding the Fourth Proportional to 7,112.21, 9,814.82 and 4,128.62

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Solution

The fourth proportional to 7,112.21, 9,814.82 and 4,128.62 is: 5,697.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.21 : 9,814.82 = 4,128.62 : x
  2. Step 2: Convert to fraction form
    7,112.21/9,814.82 = 4,128.62/x
  3. Step 3: Cross multiply
    7,112.21x = 9,814.82 × 4,128.62
  4. Step 4: Simplify right side
    7,112.21x = 40,521,592.43
  5. Step 5: Solve for x
    x = 40,521,592.43/7,112.21
  6. Step 6: Final answer
    x = 5,697.47

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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.