Home / 21,645.90-29,874.63-15,675.39

Finding the Fourth Proportional to 21,645.90, 29,874.63 and 15,675.39

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Solution

The fourth proportional to 21,645.90, 29,874.63 and 15,675.39 is: 21,634.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,645.90 : 29,874.63 = 15,675.39 : x
  2. Step 2: Convert to fraction form
    21,645.90/29,874.63 = 15,675.39/x
  3. Step 3: Cross multiply
    21,645.90x = 29,874.63 × 15,675.39
  4. Step 4: Simplify right side
    21,645.90x = 468,296,476.36
  5. Step 5: Solve for x
    x = 468,296,476.36/21,645.90
  6. Step 6: Final answer
    x = 21,634.42

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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.