Home / 12,112.31-16,719.67-8,077.68

Finding the Fourth Proportional to 12,112.31, 16,719.67 and 8,077.68

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Solution

The fourth proportional to 12,112.31, 16,719.67 and 8,077.68 is: 11,150.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,112.31 : 16,719.67 = 8,077.68 : x
  2. Step 2: Convert to fraction form
    12,112.31/16,719.67 = 8,077.68/x
  3. Step 3: Cross multiply
    12,112.31x = 16,719.67 × 8,077.68
  4. Step 4: Simplify right side
    12,112.31x = 135,056,123.77
  5. Step 5: Solve for x
    x = 135,056,123.77/12,112.31
  6. Step 6: Final answer
    x = 11,150.32

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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.