Home / 20,719.81-28,595.34-12,766.69

Finding the Fourth Proportional to 20,719.81, 28,595.34 and 12,766.69

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Solution

The fourth proportional to 20,719.81, 28,595.34 and 12,766.69 is: 17,619.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.81 : 28,595.34 = 12,766.69 : x
  2. Step 2: Convert to fraction form
    20,719.81/28,595.34 = 12,766.69/x
  3. Step 3: Cross multiply
    20,719.81x = 28,595.34 × 12,766.69
  4. Step 4: Simplify right side
    20,719.81x = 365,067,841.22
  5. Step 5: Solve for x
    x = 365,067,841.22/20,719.81
  6. Step 6: Final answer
    x = 17,619.27

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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.