Home / 21,379-29,503.02-11,947.57

Finding the Fourth Proportional to 21,379, 29,503.02 and 11,947.57

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Solution

The fourth proportional to 21,379, 29,503.02 and 11,947.57 is: 16,487.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,379 : 29,503.02 = 11,947.57 : x
  2. Step 2: Convert to fraction form
    21,379/29,503.02 = 11,947.57/x
  3. Step 3: Cross multiply
    21,379x = 29,503.02 × 11,947.57
  4. Step 4: Simplify right side
    21,379x = 352,489,396.66
  5. Step 5: Solve for x
    x = 352,489,396.66/21,379
  6. Step 6: Final answer
    x = 16,487.65

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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.