Home / 20,678.70-28,536.78-12,293.58

Finding the Fourth Proportional to 20,678.70, 28,536.78 and 12,293.58

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Solution

The fourth proportional to 20,678.70, 28,536.78 and 12,293.58 is: 16,965.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.70 : 28,536.78 = 12,293.58 : x
  2. Step 2: Convert to fraction form
    20,678.70/28,536.78 = 12,293.58/x
  3. Step 3: Cross multiply
    20,678.70x = 28,536.78 × 12,293.58
  4. Step 4: Simplify right side
    20,678.70x = 350,819,187.87
  5. Step 5: Solve for x
    x = 350,819,187.87/20,678.70
  6. Step 6: Final answer
    x = 16,965.24

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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.