Home / 20,176.32-27,835.20-12,720

Finding the Fourth Proportional to 20,176.32, 27,835.20 and 12,720

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Solution

The fourth proportional to 20,176.32, 27,835.20 and 12,720 is: 17,548.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,176.32 : 27,835.20 = 12,720 : x
  2. Step 2: Convert to fraction form
    20,176.32/27,835.20 = 12,720/x
  3. Step 3: Cross multiply
    20,176.32x = 27,835.20 × 12,720
  4. Step 4: Simplify right side
    20,176.32x = 354,063,744
  5. Step 5: Solve for x
    x = 354,063,744/20,176.32
  6. Step 6: Final answer
    x = 17,548.48

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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.