Home / 21,379.41-29,501.82-11,947.77

Finding the Fourth Proportional to 21,379.41, 29,501.82 and 11,947.77

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Solution

The fourth proportional to 21,379.41, 29,501.82 and 11,947.77 is: 16,486.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,379.41 : 29,501.82 = 11,947.77 : x
  2. Step 2: Convert to fraction form
    21,379.41/29,501.82 = 11,947.77/x
  3. Step 3: Cross multiply
    21,379.41x = 29,501.82 × 11,947.77
  4. Step 4: Simplify right side
    21,379.41x = 352,480,959.94
  5. Step 5: Solve for x
    x = 352,480,959.94/21,379.41
  6. Step 6: Final answer
    x = 16,486.94

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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.