Home / 20,630.79-28,468.53-12,671.73

Finding the Fourth Proportional to 20,630.79, 28,468.53 and 12,671.73

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Solution

The fourth proportional to 20,630.79, 28,468.53 and 12,671.73 is: 17,485.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.79 : 28,468.53 = 12,671.73 : x
  2. Step 2: Convert to fraction form
    20,630.79/28,468.53 = 12,671.73/x
  3. Step 3: Cross multiply
    20,630.79x = 28,468.53 × 12,671.73
  4. Step 4: Simplify right side
    20,630.79x = 360,745,525.66
  5. Step 5: Solve for x
    x = 360,745,525.66/20,630.79
  6. Step 6: Final answer
    x = 17,485.78

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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.