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Finding the Fourth Proportional to 15,699.60, 21,684.60 and 11,738.25

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Solution

The fourth proportional to 15,699.60, 21,684.60 and 11,738.25 is: 16,213.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,699.60 : 21,684.60 = 11,738.25 : x
  2. Step 2: Convert to fraction form
    15,699.60/21,684.60 = 11,738.25/x
  3. Step 3: Cross multiply
    15,699.60x = 21,684.60 × 11,738.25
  4. Step 4: Simplify right side
    15,699.60x = 254,539,255.95
  5. Step 5: Solve for x
    x = 254,539,255.95/15,699.60
  6. Step 6: Final answer
    x = 16,213.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.