Home / 21,435.62-29,581.25-12,489.26

Finding the Fourth Proportional to 21,435.62, 29,581.25 and 12,489.26

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Solution

The fourth proportional to 21,435.62, 29,581.25 and 12,489.26 is: 17,235.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,435.62 : 29,581.25 = 12,489.26 : x
  2. Step 2: Convert to fraction form
    21,435.62/29,581.25 = 12,489.26/x
  3. Step 3: Cross multiply
    21,435.62x = 29,581.25 × 12,489.26
  4. Step 4: Simplify right side
    21,435.62x = 369,447,712.02
  5. Step 5: Solve for x
    x = 369,447,712.02/21,435.62
  6. Step 6: Final answer
    x = 17,235.23

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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.