Home / 21,247.21-29,319.69-11,815.84

Finding the Fourth Proportional to 21,247.21, 29,319.69 and 11,815.84

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Solution

The fourth proportional to 21,247.21, 29,319.69 and 11,815.84 is: 16,305.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,247.21 : 29,319.69 = 11,815.84 : x
  2. Step 2: Convert to fraction form
    21,247.21/29,319.69 = 11,815.84/x
  3. Step 3: Cross multiply
    21,247.21x = 29,319.69 × 11,815.84
  4. Step 4: Simplify right side
    21,247.21x = 346,436,765.89
  5. Step 5: Solve for x
    x = 346,436,765.89/21,247.21
  6. Step 6: Final answer
    x = 16,305.05

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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.