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Finding the Fourth Proportional to 28,483.70, 42,729.60 and 8,763.86

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Solution

The fourth proportional to 28,483.70, 42,729.60 and 8,763.86 is: 13,147.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,483.70 : 42,729.60 = 8,763.86 : x
  2. Step 2: Convert to fraction form
    28,483.70/42,729.60 = 8,763.86/x
  3. Step 3: Cross multiply
    28,483.70x = 42,729.60 × 8,763.86
  4. Step 4: Simplify right side
    28,483.70x = 374,476,232.26
  5. Step 5: Solve for x
    x = 374,476,232.26/28,483.70
  6. Step 6: Final answer
    x = 13,147.04

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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.