Home / 21,221.98-29,296.72-13,266.77

Finding the Fourth Proportional to 21,221.98, 29,296.72 and 13,266.77

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Solution

The fourth proportional to 21,221.98, 29,296.72 and 13,266.77 is: 18,314.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.98 : 29,296.72 = 13,266.77 : x
  2. Step 2: Convert to fraction form
    21,221.98/29,296.72 = 13,266.77/x
  3. Step 3: Cross multiply
    21,221.98x = 29,296.72 × 13,266.77
  4. Step 4: Simplify right side
    21,221.98x = 388,672,845.99
  5. Step 5: Solve for x
    x = 388,672,845.99/21,221.98
  6. Step 6: Final answer
    x = 18,314.64

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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.