Home / 20,991.08-28,967.16-12,043.88

Finding the Fourth Proportional to 20,991.08, 28,967.16 and 12,043.88

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Solution

The fourth proportional to 20,991.08, 28,967.16 and 12,043.88 is: 16,620.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.08 : 28,967.16 = 12,043.88 : x
  2. Step 2: Convert to fraction form
    20,991.08/28,967.16 = 12,043.88/x
  3. Step 3: Cross multiply
    20,991.08x = 28,967.16 × 12,043.88
  4. Step 4: Simplify right side
    20,991.08x = 348,876,998.98
  5. Step 5: Solve for x
    x = 348,876,998.98/20,991.08
  6. Step 6: Final answer
    x = 16,620.25

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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.