Home / 20,805.24-28,711.23-11,373.80

Finding the Fourth Proportional to 20,805.24, 28,711.23 and 11,373.80

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Solution

The fourth proportional to 20,805.24, 28,711.23 and 11,373.80 is: 15,695.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.24 : 28,711.23 = 11,373.80 : x
  2. Step 2: Convert to fraction form
    20,805.24/28,711.23 = 11,373.80/x
  3. Step 3: Cross multiply
    20,805.24x = 28,711.23 × 11,373.80
  4. Step 4: Simplify right side
    20,805.24x = 326,555,709.23
  5. Step 5: Solve for x
    x = 326,555,709.23/20,805.24
  6. Step 6: Final answer
    x = 15,695.84

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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.