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Finding the Fourth Proportional to 15,881.64, 21,881.28 and 11,625.48

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Solution

The fourth proportional to 15,881.64, 21,881.28 and 11,625.48 is: 16,017.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,881.64 : 21,881.28 = 11,625.48 : x
  2. Step 2: Convert to fraction form
    15,881.64/21,881.28 = 11,625.48/x
  3. Step 3: Cross multiply
    15,881.64x = 21,881.28 × 11,625.48
  4. Step 4: Simplify right side
    15,881.64x = 254,380,383.01
  5. Step 5: Solve for x
    x = 254,380,383.01/15,881.64
  6. Step 6: Final answer
    x = 16,017.26

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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.