Home / 7,085.78-9,778.19-4,101.54

Finding the Fourth Proportional to 7,085.78, 9,778.19 and 4,101.54

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Solution

The fourth proportional to 7,085.78, 9,778.19 and 4,101.54 is: 5,660.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,085.78 : 9,778.19 = 4,101.54 : x
  2. Step 2: Convert to fraction form
    7,085.78/9,778.19 = 4,101.54/x
  3. Step 3: Cross multiply
    7,085.78x = 9,778.19 × 4,101.54
  4. Step 4: Simplify right side
    7,085.78x = 40,105,580.24
  5. Step 5: Solve for x
    x = 40,105,580.24/7,085.78
  6. Step 6: Final answer
    x = 5,660.01

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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.