Home / 20,429.92-28,189.88-12,048.08

Finding the Fourth Proportional to 20,429.92, 28,189.88 and 12,048.08

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Solution

The fourth proportional to 20,429.92, 28,189.88 and 12,048.08 is: 16,624.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.92 : 28,189.88 = 12,048.08 : x
  2. Step 2: Convert to fraction form
    20,429.92/28,189.88 = 12,048.08/x
  3. Step 3: Cross multiply
    20,429.92x = 28,189.88 × 12,048.08
  4. Step 4: Simplify right side
    20,429.92x = 339,633,929.43
  5. Step 5: Solve for x
    x = 339,633,929.43/20,429.92
  6. Step 6: Final answer
    x = 16,624.34

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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.