Home / 20,992.23-28,970.49-12,039.66

Finding the Fourth Proportional to 20,992.23, 28,970.49 and 12,039.66

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Solution

The fourth proportional to 20,992.23, 28,970.49 and 12,039.66 is: 16,615.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.23 : 28,970.49 = 12,039.66 : x
  2. Step 2: Convert to fraction form
    20,992.23/28,970.49 = 12,039.66/x
  3. Step 3: Cross multiply
    20,992.23x = 28,970.49 × 12,039.66
  4. Step 4: Simplify right side
    20,992.23x = 348,794,849.63
  5. Step 5: Solve for x
    x = 348,794,849.63/20,992.23
  6. Step 6: Final answer
    x = 16,615.43

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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.