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Finding the Fourth Proportional to 28,422.54, 42,626.53 and 8,427.35

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Solution

The fourth proportional to 28,422.54, 42,626.53 and 8,427.35 is: 12,638.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,422.54 : 42,626.53 = 8,427.35 : x
  2. Step 2: Convert to fraction form
    28,422.54/42,626.53 = 8,427.35/x
  3. Step 3: Cross multiply
    28,422.54x = 42,626.53 × 8,427.35
  4. Step 4: Simplify right side
    28,422.54x = 359,228,687.60
  5. Step 5: Solve for x
    x = 359,228,687.60/28,422.54
  6. Step 6: Final answer
    x = 12,638.87

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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.