Home / 21,157.27-29,160.48-18,451.63

Finding the Fourth Proportional to 21,157.27, 29,160.48 and 18,451.63

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Solution

The fourth proportional to 21,157.27, 29,160.48 and 18,451.63 is: 25,431.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.27 : 29,160.48 = 18,451.63 : x
  2. Step 2: Convert to fraction form
    21,157.27/29,160.48 = 18,451.63/x
  3. Step 3: Cross multiply
    21,157.27x = 29,160.48 × 18,451.63
  4. Step 4: Simplify right side
    21,157.27x = 538,058,387.58
  5. Step 5: Solve for x
    x = 538,058,387.58/21,157.27
  6. Step 6: Final answer
    x = 25,431.37

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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.