Home / 21,639.33-29,861.69-12,208.77

Finding the Fourth Proportional to 21,639.33, 29,861.69 and 12,208.77

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Solution

The fourth proportional to 21,639.33, 29,861.69 and 12,208.77 is: 16,847.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,639.33 : 29,861.69 = 12,208.77 : x
  2. Step 2: Convert to fraction form
    21,639.33/29,861.69 = 12,208.77/x
  3. Step 3: Cross multiply
    21,639.33x = 29,861.69 × 12,208.77
  4. Step 4: Simplify right side
    21,639.33x = 364,574,443.98
  5. Step 5: Solve for x
    x = 364,574,443.98/21,639.33
  6. Step 6: Final answer
    x = 16,847.77

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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.