Home / 21,885.41-30,201.84-12,936.14

Finding the Fourth Proportional to 21,885.41, 30,201.84 and 12,936.14

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Solution

The fourth proportional to 21,885.41, 30,201.84 and 12,936.14 is: 17,851.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,885.41 : 30,201.84 = 12,936.14 : x
  2. Step 2: Convert to fraction form
    21,885.41/30,201.84 = 12,936.14/x
  3. Step 3: Cross multiply
    21,885.41x = 30,201.84 × 12,936.14
  4. Step 4: Simplify right side
    21,885.41x = 390,695,230.50
  5. Step 5: Solve for x
    x = 390,695,230.50/21,885.41
  6. Step 6: Final answer
    x = 17,851.86

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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.