Home / 20,719.29-28,602.20-12,218.54

Finding the Fourth Proportional to 20,719.29, 28,602.20 and 12,218.54

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Solution

The fourth proportional to 20,719.29, 28,602.20 and 12,218.54 is: 16,867.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.29 : 28,602.20 = 12,218.54 : x
  2. Step 2: Convert to fraction form
    20,719.29/28,602.20 = 12,218.54/x
  3. Step 3: Cross multiply
    20,719.29x = 28,602.20 × 12,218.54
  4. Step 4: Simplify right side
    20,719.29x = 349,477,063.70
  5. Step 5: Solve for x
    x = 349,477,063.70/20,719.29
  6. Step 6: Final answer
    x = 16,867.23

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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.