Home / 20,768.13-28,660.04-12,814.98

Finding the Fourth Proportional to 20,768.13, 28,660.04 and 12,814.98

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Solution

The fourth proportional to 20,768.13, 28,660.04 and 12,814.98 is: 17,684.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.13 : 28,660.04 = 12,814.98 : x
  2. Step 2: Convert to fraction form
    20,768.13/28,660.04 = 12,814.98/x
  3. Step 3: Cross multiply
    20,768.13x = 28,660.04 × 12,814.98
  4. Step 4: Simplify right side
    20,768.13x = 367,277,715.91
  5. Step 5: Solve for x
    x = 367,277,715.91/20,768.13
  6. Step 6: Final answer
    x = 17,684.68

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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.