Home / 20,679.17-28,529.52-12,176.09

Finding the Fourth Proportional to 20,679.17, 28,529.52 and 12,176.09

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Solution

The fourth proportional to 20,679.17, 28,529.52 and 12,176.09 is: 16,798.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.17 : 28,529.52 = 12,176.09 : x
  2. Step 2: Convert to fraction form
    20,679.17/28,529.52 = 12,176.09/x
  3. Step 3: Cross multiply
    20,679.17x = 28,529.52 × 12,176.09
  4. Step 4: Simplify right side
    20,679.17x = 347,377,921.85
  5. Step 5: Solve for x
    x = 347,377,921.85/20,679.17
  6. Step 6: Final answer
    x = 16,798.45

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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.