Home / 8,678.96-13,015.74-3,131.58

Finding the Fourth Proportional to 8,678.96, 13,015.74 and 3,131.58

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Solution

The fourth proportional to 8,678.96, 13,015.74 and 3,131.58 is: 4,696.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678.96 : 13,015.74 = 3,131.58 : x
  2. Step 2: Convert to fraction form
    8,678.96/13,015.74 = 3,131.58/x
  3. Step 3: Cross multiply
    8,678.96x = 13,015.74 × 3,131.58
  4. Step 4: Simplify right side
    8,678.96x = 40,759,831.07
  5. Step 5: Solve for x
    x = 40,759,831.07/8,678.96
  6. Step 6: Final answer
    x = 4,696.40

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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.