Home / 20,087.04-27,722.40-12,129.27

Finding the Fourth Proportional to 20,087.04, 27,722.40 and 12,129.27

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Solution

The fourth proportional to 20,087.04, 27,722.40 and 12,129.27 is: 16,739.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,087.04 : 27,722.40 = 12,129.27 : x
  2. Step 2: Convert to fraction form
    20,087.04/27,722.40 = 12,129.27/x
  3. Step 3: Cross multiply
    20,087.04x = 27,722.40 × 12,129.27
  4. Step 4: Simplify right side
    20,087.04x = 336,252,474.65
  5. Step 5: Solve for x
    x = 336,252,474.65/20,087.04
  6. Step 6: Final answer
    x = 16,739.77

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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.