Home / 7,111.76-9,814.16-4,129.28

Finding the Fourth Proportional to 7,111.76, 9,814.16 and 4,129.28

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Solution

The fourth proportional to 7,111.76, 9,814.16 and 4,129.28 is: 5,698.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.76 : 9,814.16 = 4,129.28 : x
  2. Step 2: Convert to fraction form
    7,111.76/9,814.16 = 4,129.28/x
  3. Step 3: Cross multiply
    7,111.76x = 9,814.16 × 4,129.28
  4. Step 4: Simplify right side
    7,111.76x = 40,525,414.60
  5. Step 5: Solve for x
    x = 40,525,414.60/7,111.76
  6. Step 6: Final answer
    x = 5,698.37

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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.