Home / 20,366.94-28,103.76-11,871.78

Finding the Fourth Proportional to 20,366.94, 28,103.76 and 11,871.78

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Solution

The fourth proportional to 20,366.94, 28,103.76 and 11,871.78 is: 16,381.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,366.94 : 28,103.76 = 11,871.78 : x
  2. Step 2: Convert to fraction form
    20,366.94/28,103.76 = 11,871.78/x
  3. Step 3: Cross multiply
    20,366.94x = 28,103.76 × 11,871.78
  4. Step 4: Simplify right side
    20,366.94x = 333,641,655.89
  5. Step 5: Solve for x
    x = 333,641,655.89/20,366.94
  6. Step 6: Final answer
    x = 16,381.53

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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.