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Finding the Fourth Proportional to 20,281.88, 30,422.82 and 6,430.88

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Solution

The fourth proportional to 20,281.88, 30,422.82 and 6,430.88 is: 9,646.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.88 : 30,422.82 = 6,430.88 : x
  2. Step 2: Convert to fraction form
    20,281.88/30,422.82 = 6,430.88/x
  3. Step 3: Cross multiply
    20,281.88x = 30,422.82 × 6,430.88
  4. Step 4: Simplify right side
    20,281.88x = 195,645,352.57
  5. Step 5: Solve for x
    x = 195,645,352.57/20,281.88
  6. Step 6: Final answer
    x = 9,646.31

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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.