Home / 12,128.87-16,739.37-6,824.72

Finding the Fourth Proportional to 12,128.87, 16,739.37 and 6,824.72

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Solution

The fourth proportional to 12,128.87, 16,739.37 and 6,824.72 is: 9,418.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.87 : 16,739.37 = 6,824.72 : x
  2. Step 2: Convert to fraction form
    12,128.87/16,739.37 = 6,824.72/x
  3. Step 3: Cross multiply
    12,128.87x = 16,739.37 × 6,824.72
  4. Step 4: Simplify right side
    12,128.87x = 114,241,555.07
  5. Step 5: Solve for x
    x = 114,241,555.07/12,128.87
  6. Step 6: Final answer
    x = 9,418.98

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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.