Home / 20,837.36-28,755.72-12,877.76

Finding the Fourth Proportional to 20,837.36, 28,755.72 and 12,877.76

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Solution

The fourth proportional to 20,837.36, 28,755.72 and 12,877.76 is: 17,771.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.36 : 28,755.72 = 12,877.76 : x
  2. Step 2: Convert to fraction form
    20,837.36/28,755.72 = 12,877.76/x
  3. Step 3: Cross multiply
    20,837.36x = 28,755.72 × 12,877.76
  4. Step 4: Simplify right side
    20,837.36x = 370,309,260.79
  5. Step 5: Solve for x
    x = 370,309,260.79/20,837.36
  6. Step 6: Final answer
    x = 17,771.41

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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.