Home / 21,753.12-30,021.24-12,677.99

Finding the Fourth Proportional to 21,753.12, 30,021.24 and 12,677.99

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Solution

The fourth proportional to 21,753.12, 30,021.24 and 12,677.99 is: 17,496.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,753.12 : 30,021.24 = 12,677.99 : x
  2. Step 2: Convert to fraction form
    21,753.12/30,021.24 = 12,677.99/x
  3. Step 3: Cross multiply
    21,753.12x = 30,021.24 × 12,677.99
  4. Step 4: Simplify right side
    21,753.12x = 380,608,830.40
  5. Step 5: Solve for x
    x = 380,608,830.40/21,753.12
  6. Step 6: Final answer
    x = 17,496.75

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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.