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Finding the Fourth Proportional to 13,766.40, 20,649.60 and 4,531.20

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Solution

The fourth proportional to 13,766.40, 20,649.60 and 4,531.20 is: 6,796.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,766.40 : 20,649.60 = 4,531.20 : x
  2. Step 2: Convert to fraction form
    13,766.40/20,649.60 = 4,531.20/x
  3. Step 3: Cross multiply
    13,766.40x = 20,649.60 × 4,531.20
  4. Step 4: Simplify right side
    13,766.40x = 93,567,467.52
  5. Step 5: Solve for x
    x = 93,567,467.52/13,766.40
  6. Step 6: Final answer
    x = 6,796.80

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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.