Home / 7,121.31-9,831.25-4,289.37

Finding the Fourth Proportional to 7,121.31, 9,831.25 and 4,289.37

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Solution

The fourth proportional to 7,121.31, 9,831.25 and 4,289.37 is: 5,921.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.31 : 9,831.25 = 4,289.37 : x
  2. Step 2: Convert to fraction form
    7,121.31/9,831.25 = 4,289.37/x
  3. Step 3: Cross multiply
    7,121.31x = 9,831.25 × 4,289.37
  4. Step 4: Simplify right side
    7,121.31x = 42,169,868.81
  5. Step 5: Solve for x
    x = 42,169,868.81/7,121.31
  6. Step 6: Final answer
    x = 5,921.64

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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.