Home / 21,290.42-29,381.69-11,858.98

Finding the Fourth Proportional to 21,290.42, 29,381.69 and 11,858.98

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Solution

The fourth proportional to 21,290.42, 29,381.69 and 11,858.98 is: 16,365.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.42 : 29,381.69 = 11,858.98 : x
  2. Step 2: Convert to fraction form
    21,290.42/29,381.69 = 11,858.98/x
  3. Step 3: Cross multiply
    21,290.42x = 29,381.69 × 11,858.98
  4. Step 4: Simplify right side
    21,290.42x = 348,436,874.08
  5. Step 5: Solve for x
    x = 348,436,874.08/21,290.42
  6. Step 6: Final answer
    x = 16,365.90

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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.