Home / 20,670.12-28,524.96-12,285

Finding the Fourth Proportional to 20,670.12, 28,524.96 and 12,285

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Solution

The fourth proportional to 20,670.12, 28,524.96 and 12,285 is: 16,953.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.12 : 28,524.96 = 12,285 : x
  2. Step 2: Convert to fraction form
    20,670.12/28,524.96 = 12,285/x
  3. Step 3: Cross multiply
    20,670.12x = 28,524.96 × 12,285
  4. Step 4: Simplify right side
    20,670.12x = 350,429,133.60
  5. Step 5: Solve for x
    x = 350,429,133.60/20,670.12
  6. Step 6: Final answer
    x = 16,953.42

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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.