Home / 6,831.90-9,428.88-4,178.76

Finding the Fourth Proportional to 6,831.90, 9,428.88 and 4,178.76

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Solution

The fourth proportional to 6,831.90, 9,428.88 and 4,178.76 is: 5,767.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,831.90 : 9,428.88 = 4,178.76 : x
  2. Step 2: Convert to fraction form
    6,831.90/9,428.88 = 4,178.76/x
  3. Step 3: Cross multiply
    6,831.90x = 9,428.88 × 4,178.76
  4. Step 4: Simplify right side
    6,831.90x = 39,401,026.59
  5. Step 5: Solve for x
    x = 39,401,026.59/6,831.90
  6. Step 6: Final answer
    x = 5,767.21

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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.