Home / 12,139.86-16,740.60-11,868.30

Finding the Fourth Proportional to 12,139.86, 16,740.60 and 11,868.30

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Solution

The fourth proportional to 12,139.86, 16,740.60 and 11,868.30 is: 16,366.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.86 : 16,740.60 = 11,868.30 : x
  2. Step 2: Convert to fraction form
    12,139.86/16,740.60 = 11,868.30/x
  3. Step 3: Cross multiply
    12,139.86x = 16,740.60 × 11,868.30
  4. Step 4: Simplify right side
    12,139.86x = 198,682,462.98
  5. Step 5: Solve for x
    x = 198,682,462.98/12,139.86
  6. Step 6: Final answer
    x = 16,366.12

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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.