Home / 7,123.75-9,831.99-3,979.33

Finding the Fourth Proportional to 7,123.75, 9,831.99 and 3,979.33

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Solution

The fourth proportional to 7,123.75, 9,831.99 and 3,979.33 is: 5,492.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,123.75 : 9,831.99 = 3,979.33 : x
  2. Step 2: Convert to fraction form
    7,123.75/9,831.99 = 3,979.33/x
  3. Step 3: Cross multiply
    7,123.75x = 9,831.99 × 3,979.33
  4. Step 4: Simplify right side
    7,123.75x = 39,124,732.77
  5. Step 5: Solve for x
    x = 39,124,732.77/7,123.75
  6. Step 6: Final answer
    x = 5,492.15

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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.