Home / 7,124.62-9,831.78-3,938.15

Finding the Fourth Proportional to 7,124.62, 9,831.78 and 3,938.15

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Solution

The fourth proportional to 7,124.62, 9,831.78 and 3,938.15 is: 5,434.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,124.62 : 9,831.78 = 3,938.15 : x
  2. Step 2: Convert to fraction form
    7,124.62/9,831.78 = 3,938.15/x
  3. Step 3: Cross multiply
    7,124.62x = 9,831.78 × 3,938.15
  4. Step 4: Simplify right side
    7,124.62x = 38,719,024.41
  5. Step 5: Solve for x
    x = 38,719,024.41/7,124.62
  6. Step 6: Final answer
    x = 5,434.54

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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.