Home / 21,635.40-29,857.08-12,076.20

Finding the Fourth Proportional to 21,635.40, 29,857.08 and 12,076.20

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Solution

The fourth proportional to 21,635.40, 29,857.08 and 12,076.20 is: 16,665.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,635.40 : 29,857.08 = 12,076.20 : x
  2. Step 2: Convert to fraction form
    21,635.40/29,857.08 = 12,076.20/x
  3. Step 3: Cross multiply
    21,635.40x = 29,857.08 × 12,076.20
  4. Step 4: Simplify right side
    21,635.40x = 360,560,069.50
  5. Step 5: Solve for x
    x = 360,560,069.50/21,635.40
  6. Step 6: Final answer
    x = 16,665.28

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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.