Home / 20,979.98-28,950.30-12,025.43

Finding the Fourth Proportional to 20,979.98, 28,950.30 and 12,025.43

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Solution

The fourth proportional to 20,979.98, 28,950.30 and 12,025.43 is: 16,593.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.98 : 28,950.30 = 12,025.43 : x
  2. Step 2: Convert to fraction form
    20,979.98/28,950.30 = 12,025.43/x
  3. Step 3: Cross multiply
    20,979.98x = 28,950.30 × 12,025.43
  4. Step 4: Simplify right side
    20,979.98x = 348,139,661.38
  5. Step 5: Solve for x
    x = 348,139,661.38/20,979.98
  6. Step 6: Final answer
    x = 16,593.90

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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.