Home / 20,673.72-28,530.30-12,711.42

Finding the Fourth Proportional to 20,673.72, 28,530.30 and 12,711.42

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Solution

The fourth proportional to 20,673.72, 28,530.30 and 12,711.42 is: 17,542.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.72 : 28,530.30 = 12,711.42 : x
  2. Step 2: Convert to fraction form
    20,673.72/28,530.30 = 12,711.42/x
  3. Step 3: Cross multiply
    20,673.72x = 28,530.30 × 12,711.42
  4. Step 4: Simplify right side
    20,673.72x = 362,660,626.03
  5. Step 5: Solve for x
    x = 362,660,626.03/20,673.72
  6. Step 6: Final answer
    x = 17,542.11

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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.