Home / 21,112.44-29,115.90-18,127.32

Finding the Fourth Proportional to 21,112.44, 29,115.90 and 18,127.32

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Solution

The fourth proportional to 21,112.44, 29,115.90 and 18,127.32 is: 24,999.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.44 : 29,115.90 = 18,127.32 : x
  2. Step 2: Convert to fraction form
    21,112.44/29,115.90 = 18,127.32/x
  3. Step 3: Cross multiply
    21,112.44x = 29,115.90 × 18,127.32
  4. Step 4: Simplify right side
    21,112.44x = 527,793,236.39
  5. Step 5: Solve for x
    x = 527,793,236.39/21,112.44
  6. Step 6: Final answer
    x = 24,999.16

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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.