Home / 21,687.55-29,929.44-12,127.18

Finding the Fourth Proportional to 21,687.55, 29,929.44 and 12,127.18

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Solution

The fourth proportional to 21,687.55, 29,929.44 and 12,127.18 is: 16,735.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,687.55 : 29,929.44 = 12,127.18 : x
  2. Step 2: Convert to fraction form
    21,687.55/29,929.44 = 12,127.18/x
  3. Step 3: Cross multiply
    21,687.55x = 29,929.44 × 12,127.18
  4. Step 4: Simplify right side
    21,687.55x = 362,959,706.18
  5. Step 5: Solve for x
    x = 362,959,706.18/21,687.55
  6. Step 6: Final answer
    x = 16,735.86

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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.