Home / 20,725.24-28,605.45-13,170.10

Finding the Fourth Proportional to 20,725.24, 28,605.45 and 13,170.10

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Solution

The fourth proportional to 20,725.24, 28,605.45 and 13,170.10 is: 18,177.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,725.24 : 28,605.45 = 13,170.10 : x
  2. Step 2: Convert to fraction form
    20,725.24/28,605.45 = 13,170.10/x
  3. Step 3: Cross multiply
    20,725.24x = 28,605.45 × 13,170.10
  4. Step 4: Simplify right side
    20,725.24x = 376,736,514.82
  5. Step 5: Solve for x
    x = 376,736,514.82/20,725.24
  6. Step 6: Final answer
    x = 18,177.67

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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.