Home / 21,129.96-29,165.94-13,167.48

Finding the Fourth Proportional to 21,129.96, 29,165.94 and 13,167.48

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Solution

The fourth proportional to 21,129.96, 29,165.94 and 13,167.48 is: 18,175.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.96 : 29,165.94 = 13,167.48 : x
  2. Step 2: Convert to fraction form
    21,129.96/29,165.94 = 13,167.48/x
  3. Step 3: Cross multiply
    21,129.96x = 29,165.94 × 13,167.48
  4. Step 4: Simplify right side
    21,129.96x = 384,041,931.63
  5. Step 5: Solve for x
    x = 384,041,931.63/21,129.96
  6. Step 6: Final answer
    x = 18,175.23

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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.