Home / 21,072.60-29,080.08-12,120.84

Finding the Fourth Proportional to 21,072.60, 29,080.08 and 12,120.84

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Solution

The fourth proportional to 21,072.60, 29,080.08 and 12,120.84 is: 16,726.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,072.60 : 29,080.08 = 12,120.84 : x
  2. Step 2: Convert to fraction form
    21,072.60/29,080.08 = 12,120.84/x
  3. Step 3: Cross multiply
    21,072.60x = 29,080.08 × 12,120.84
  4. Step 4: Simplify right side
    21,072.60x = 352,474,996.87
  5. Step 5: Solve for x
    x = 352,474,996.87/21,072.60
  6. Step 6: Final answer
    x = 16,726.70

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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.