Home / 12,078.86-16,667.70-6,772.55

Finding the Fourth Proportional to 12,078.86, 16,667.70 and 6,772.55

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Solution

The fourth proportional to 12,078.86, 16,667.70 and 6,772.55 is: 9,345.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078.86 : 16,667.70 = 6,772.55 : x
  2. Step 2: Convert to fraction form
    12,078.86/16,667.70 = 6,772.55/x
  3. Step 3: Cross multiply
    12,078.86x = 16,667.70 × 6,772.55
  4. Step 4: Simplify right side
    12,078.86x = 112,882,831.64
  5. Step 5: Solve for x
    x = 112,882,831.64/12,078.86
  6. Step 6: Final answer
    x = 9,345.49

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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.