Home / 20,786.14-28,663.05-13,703.50

Finding the Fourth Proportional to 20,786.14, 28,663.05 and 13,703.50

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Solution

The fourth proportional to 20,786.14, 28,663.05 and 13,703.50 is: 18,896.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.14 : 28,663.05 = 13,703.50 : x
  2. Step 2: Convert to fraction form
    20,786.14/28,663.05 = 13,703.50/x
  3. Step 3: Cross multiply
    20,786.14x = 28,663.05 × 13,703.50
  4. Step 4: Simplify right side
    20,786.14x = 392,784,105.68
  5. Step 5: Solve for x
    x = 392,784,105.68/20,786.14
  6. Step 6: Final answer
    x = 18,896.44

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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.