Home / 20,687.57-28,550.95-12,192.32

Finding the Fourth Proportional to 20,687.57, 28,550.95 and 12,192.32

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Solution

The fourth proportional to 20,687.57, 28,550.95 and 12,192.32 is: 16,826.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.57 : 28,550.95 = 12,192.32 : x
  2. Step 2: Convert to fraction form
    20,687.57/28,550.95 = 12,192.32/x
  3. Step 3: Cross multiply
    20,687.57x = 28,550.95 × 12,192.32
  4. Step 4: Simplify right side
    20,687.57x = 348,102,359.60
  5. Step 5: Solve for x
    x = 348,102,359.60/20,687.57
  6. Step 6: Final answer
    x = 16,826.64

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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.