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Finding the Fourth Proportional to 15,840.60, 21,845.07 and 11,816.31

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Solution

The fourth proportional to 15,840.60, 21,845.07 and 11,816.31 is: 16,295.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,840.60 : 21,845.07 = 11,816.31 : x
  2. Step 2: Convert to fraction form
    15,840.60/21,845.07 = 11,816.31/x
  3. Step 3: Cross multiply
    15,840.60x = 21,845.07 × 11,816.31
  4. Step 4: Simplify right side
    15,840.60x = 258,128,119.09
  5. Step 5: Solve for x
    x = 258,128,119.09/15,840.60
  6. Step 6: Final answer
    x = 16,295.35

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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.