Home / 21,587.40-29,790.25-12,635.28

Finding the Fourth Proportional to 21,587.40, 29,790.25 and 12,635.28

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Solution

The fourth proportional to 21,587.40, 29,790.25 and 12,635.28 is: 17,436.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,587.40 : 29,790.25 = 12,635.28 : x
  2. Step 2: Convert to fraction form
    21,587.40/29,790.25 = 12,635.28/x
  3. Step 3: Cross multiply
    21,587.40x = 29,790.25 × 12,635.28
  4. Step 4: Simplify right side
    21,587.40x = 376,408,118.43
  5. Step 5: Solve for x
    x = 376,408,118.43/21,587.40
  6. Step 6: Final answer
    x = 17,436.47

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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.