Home / 20,518.40-28,505.60-20,326.40

Finding the Fourth Proportional to 20,518.40, 28,505.60 and 20,326.40

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Solution

The fourth proportional to 20,518.40, 28,505.60 and 20,326.40 is: 28,238.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.40 : 28,505.60 = 20,326.40 : x
  2. Step 2: Convert to fraction form
    20,518.40/28,505.60 = 20,326.40/x
  3. Step 3: Cross multiply
    20,518.40x = 28,505.60 × 20,326.40
  4. Step 4: Simplify right side
    20,518.40x = 579,416,227.84
  5. Step 5: Solve for x
    x = 579,416,227.84/20,518.40
  6. Step 6: Final answer
    x = 28,238.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.