Home / 20,638.54-28,494.21-15,327.10

Finding the Fourth Proportional to 20,638.54, 28,494.21 and 15,327.10

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Solution

The fourth proportional to 20,638.54, 28,494.21 and 15,327.10 is: 21,161.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.54 : 28,494.21 = 15,327.10 : x
  2. Step 2: Convert to fraction form
    20,638.54/28,494.21 = 15,327.10/x
  3. Step 3: Cross multiply
    20,638.54x = 28,494.21 × 15,327.10
  4. Step 4: Simplify right side
    20,638.54x = 436,733,606.09
  5. Step 5: Solve for x
    x = 436,733,606.09/20,638.54
  6. Step 6: Final answer
    x = 21,161.07

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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.