Home / 20,818.74-28,729.38-12,755.55

Finding the Fourth Proportional to 20,818.74, 28,729.38 and 12,755.55

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Solution

The fourth proportional to 20,818.74, 28,729.38 and 12,755.55 is: 17,602.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.74 : 28,729.38 = 12,755.55 : x
  2. Step 2: Convert to fraction form
    20,818.74/28,729.38 = 12,755.55/x
  3. Step 3: Cross multiply
    20,818.74x = 28,729.38 × 12,755.55
  4. Step 4: Simplify right side
    20,818.74x = 366,459,043.06
  5. Step 5: Solve for x
    x = 366,459,043.06/20,818.74
  6. Step 6: Final answer
    x = 17,602.36

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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.