Home / 20,790.95-28,683.36-12,819.33

Finding the Fourth Proportional to 20,790.95, 28,683.36 and 12,819.33

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Solution

The fourth proportional to 20,790.95, 28,683.36 and 12,819.33 is: 17,685.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.95 : 28,683.36 = 12,819.33 : x
  2. Step 2: Convert to fraction form
    20,790.95/28,683.36 = 12,819.33/x
  3. Step 3: Cross multiply
    20,790.95x = 28,683.36 × 12,819.33
  4. Step 4: Simplify right side
    20,790.95x = 367,701,457.35
  5. Step 5: Solve for x
    x = 367,701,457.35/20,790.95
  6. Step 6: Final answer
    x = 17,685.65

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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.