Home / 21,199.20-29,244.69-12,699.06

Finding the Fourth Proportional to 21,199.20, 29,244.69 and 12,699.06

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Solution

The fourth proportional to 21,199.20, 29,244.69 and 12,699.06 is: 17,518.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.20 : 29,244.69 = 12,699.06 : x
  2. Step 2: Convert to fraction form
    21,199.20/29,244.69 = 12,699.06/x
  3. Step 3: Cross multiply
    21,199.20x = 29,244.69 × 12,699.06
  4. Step 4: Simplify right side
    21,199.20x = 371,380,072.99
  5. Step 5: Solve for x
    x = 371,380,072.99/21,199.20
  6. Step 6: Final answer
    x = 17,518.59

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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.