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Finding the Fourth Proportional to 20,281.58, 30,422.48 and 20,252.42

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Solution

The fourth proportional to 20,281.58, 30,422.48 and 20,252.42 is: 30,378.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.58 : 30,422.48 = 20,252.42 : x
  2. Step 2: Convert to fraction form
    20,281.58/30,422.48 = 20,252.42/x
  3. Step 3: Cross multiply
    20,281.58x = 30,422.48 × 20,252.42
  4. Step 4: Simplify right side
    20,281.58x = 616,128,842.40
  5. Step 5: Solve for x
    x = 616,128,842.40/20,281.58
  6. Step 6: Final answer
    x = 30,378.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.