Home / 20,679.63-28,530.16-12,176.56

Finding the Fourth Proportional to 20,679.63, 28,530.16 and 12,176.56

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Solution

The fourth proportional to 20,679.63, 28,530.16 and 12,176.56 is: 16,799.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.63 : 28,530.16 = 12,176.56 : x
  2. Step 2: Convert to fraction form
    20,679.63/28,530.16 = 12,176.56/x
  3. Step 3: Cross multiply
    20,679.63x = 28,530.16 × 12,176.56
  4. Step 4: Simplify right side
    20,679.63x = 347,399,171.78
  5. Step 5: Solve for x
    x = 347,399,171.78/20,679.63
  6. Step 6: Final answer
    x = 16,799.10

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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.