Home / 21,820.19-30,111.55-14,279.09

Finding the Fourth Proportional to 21,820.19, 30,111.55 and 14,279.09

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Solution

The fourth proportional to 21,820.19, 30,111.55 and 14,279.09 is: 19,704.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,820.19 : 30,111.55 = 14,279.09 : x
  2. Step 2: Convert to fraction form
    21,820.19/30,111.55 = 14,279.09/x
  3. Step 3: Cross multiply
    21,820.19x = 30,111.55 × 14,279.09
  4. Step 4: Simplify right side
    21,820.19x = 429,965,346.23
  5. Step 5: Solve for x
    x = 429,965,346.23/21,820.19
  6. Step 6: Final answer
    x = 19,704.94

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.