Home / 21,155.41-29,195.64-11,723.77

Finding the Fourth Proportional to 21,155.41, 29,195.64 and 11,723.77

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Solution

The fourth proportional to 21,155.41, 29,195.64 and 11,723.77 is: 16,179.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.41 : 29,195.64 = 11,723.77 : x
  2. Step 2: Convert to fraction form
    21,155.41/29,195.64 = 11,723.77/x
  3. Step 3: Cross multiply
    21,155.41x = 29,195.64 × 11,723.77
  4. Step 4: Simplify right side
    21,155.41x = 342,282,895.37
  5. Step 5: Solve for x
    x = 342,282,895.37/21,155.41
  6. Step 6: Final answer
    x = 16,179.45

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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.