Home / 21,687.21-29,927.73-12,126.51

Finding the Fourth Proportional to 21,687.21, 29,927.73 and 12,126.51

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Solution

The fourth proportional to 21,687.21, 29,927.73 and 12,126.51 is: 16,734.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,687.21 : 29,927.73 = 12,126.51 : x
  2. Step 2: Convert to fraction form
    21,687.21/29,927.73 = 12,126.51/x
  3. Step 3: Cross multiply
    21,687.21x = 29,927.73 × 12,126.51
  4. Step 4: Simplify right side
    21,687.21x = 362,918,917.12
  5. Step 5: Solve for x
    x = 362,918,917.12/21,687.21
  6. Step 6: Final answer
    x = 16,734.24

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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.