Home / 7,831.92-11,748.42-2,638.20

Finding the Fourth Proportional to 7,831.92, 11,748.42 and 2,638.20

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Solution

The fourth proportional to 7,831.92, 11,748.42 and 2,638.20 is: 3,957.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,831.92 : 11,748.42 = 2,638.20 : x
  2. Step 2: Convert to fraction form
    7,831.92/11,748.42 = 2,638.20/x
  3. Step 3: Cross multiply
    7,831.92x = 11,748.42 × 2,638.20
  4. Step 4: Simplify right side
    7,831.92x = 30,994,681.64
  5. Step 5: Solve for x
    x = 30,994,681.64/7,831.92
  6. Step 6: Final answer
    x = 3,957.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.