Home / 20,991.88-28,967.86-12,032.96

Finding the Fourth Proportional to 20,991.88, 28,967.86 and 12,032.96

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Solution

The fourth proportional to 20,991.88, 28,967.86 and 12,032.96 is: 16,604.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.88 : 28,967.86 = 12,032.96 : x
  2. Step 2: Convert to fraction form
    20,991.88/28,967.86 = 12,032.96/x
  3. Step 3: Cross multiply
    20,991.88x = 28,967.86 × 12,032.96
  4. Step 4: Simplify right side
    20,991.88x = 348,569,100.67
  5. Step 5: Solve for x
    x = 348,569,100.67/20,991.88
  6. Step 6: Final answer
    x = 16,604.95

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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.