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Finding the Fourth Proportional to 36,719.71, 50,672.21 and 20,809.28

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Solution

The fourth proportional to 36,719.71, 50,672.21 and 20,809.28 is: 28,716.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,719.71 : 50,672.21 = 20,809.28 : x
  2. Step 2: Convert to fraction form
    36,719.71/50,672.21 = 20,809.28/x
  3. Step 3: Cross multiply
    36,719.71x = 50,672.21 × 20,809.28
  4. Step 4: Simplify right side
    36,719.71x = 1,054,452,206.11
  5. Step 5: Solve for x
    x = 1,054,452,206.11/36,719.71
  6. Step 6: Final answer
    x = 28,716.25

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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.