Home / 12,679.37-17,511.89-8,639.19

Finding the Fourth Proportional to 12,679.37, 17,511.89 and 8,639.19

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Solution

The fourth proportional to 12,679.37, 17,511.89 and 8,639.19 is: 11,931.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.37 : 17,511.89 = 8,639.19 : x
  2. Step 2: Convert to fraction form
    12,679.37/17,511.89 = 8,639.19/x
  3. Step 3: Cross multiply
    12,679.37x = 17,511.89 × 8,639.19
  4. Step 4: Simplify right side
    12,679.37x = 151,288,501.77
  5. Step 5: Solve for x
    x = 151,288,501.77/12,679.37
  6. Step 6: Final answer
    x = 11,931.86

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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.