Home / 20,631.61-28,469.27-12,671.84

Finding the Fourth Proportional to 20,631.61, 28,469.27 and 12,671.84

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Solution

The fourth proportional to 20,631.61, 28,469.27 and 12,671.84 is: 17,485.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631.61 : 28,469.27 = 12,671.84 : x
  2. Step 2: Convert to fraction form
    20,631.61/28,469.27 = 12,671.84/x
  3. Step 3: Cross multiply
    20,631.61x = 28,469.27 × 12,671.84
  4. Step 4: Simplify right side
    20,631.61x = 360,758,137.21
  5. Step 5: Solve for x
    x = 360,758,137.21/20,631.61
  6. Step 6: Final answer
    x = 17,485.70

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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.