Home / 20,667.45-28,520.78-11,714.79

Finding the Fourth Proportional to 20,667.45, 28,520.78 and 11,714.79

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Solution

The fourth proportional to 20,667.45, 28,520.78 and 11,714.79 is: 16,166.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.45 : 28,520.78 = 11,714.79 : x
  2. Step 2: Convert to fraction form
    20,667.45/28,520.78 = 11,714.79/x
  3. Step 3: Cross multiply
    20,667.45x = 28,520.78 × 11,714.79
  4. Step 4: Simplify right side
    20,667.45x = 334,114,889.76
  5. Step 5: Solve for x
    x = 334,114,889.76/20,667.45
  6. Step 6: Final answer
    x = 16,166.24

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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.