Home / 20,842.97-28,762.98-11,890.61

Finding the Fourth Proportional to 20,842.97, 28,762.98 and 11,890.61

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Solution

The fourth proportional to 20,842.97, 28,762.98 and 11,890.61 is: 16,408.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,842.97 : 28,762.98 = 11,890.61 : x
  2. Step 2: Convert to fraction form
    20,842.97/28,762.98 = 11,890.61/x
  3. Step 3: Cross multiply
    20,842.97x = 28,762.98 × 11,890.61
  4. Step 4: Simplify right side
    20,842.97x = 342,009,233.80
  5. Step 5: Solve for x
    x = 342,009,233.80/20,842.97
  6. Step 6: Final answer
    x = 16,408.86

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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.