Home / 20,645.75-28,491.21-12,148.20

Finding the Fourth Proportional to 20,645.75, 28,491.21 and 12,148.20

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Solution

The fourth proportional to 20,645.75, 28,491.21 and 12,148.20 is: 16,764.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.75 : 28,491.21 = 12,148.20 : x
  2. Step 2: Convert to fraction form
    20,645.75/28,491.21 = 12,148.20/x
  3. Step 3: Cross multiply
    20,645.75x = 28,491.21 × 12,148.20
  4. Step 4: Simplify right side
    20,645.75x = 346,116,917.32
  5. Step 5: Solve for x
    x = 346,116,917.32/20,645.75
  6. Step 6: Final answer
    x = 16,764.56

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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.