Home / 10,785.78-16,178.67-3,390.89

Finding the Fourth Proportional to 10,785.78, 16,178.67 and 3,390.89

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Solution

The fourth proportional to 10,785.78, 16,178.67 and 3,390.89 is: 5,086.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,785.78 : 16,178.67 = 3,390.89 : x
  2. Step 2: Convert to fraction form
    10,785.78/16,178.67 = 3,390.89/x
  3. Step 3: Cross multiply
    10,785.78x = 16,178.67 × 3,390.89
  4. Step 4: Simplify right side
    10,785.78x = 54,860,009.42
  5. Step 5: Solve for x
    x = 54,860,009.42/10,785.78
  6. Step 6: Final answer
    x = 5,086.33

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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.