Home / 21,363.90-29,481.75-12,983.10

Finding the Fourth Proportional to 21,363.90, 29,481.75 and 12,983.10

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Solution

The fourth proportional to 21,363.90, 29,481.75 and 12,983.10 is: 17,916.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,363.90 : 29,481.75 = 12,983.10 : x
  2. Step 2: Convert to fraction form
    21,363.90/29,481.75 = 12,983.10/x
  3. Step 3: Cross multiply
    21,363.90x = 29,481.75 × 12,983.10
  4. Step 4: Simplify right side
    21,363.90x = 382,764,508.43
  5. Step 5: Solve for x
    x = 382,764,508.43/21,363.90
  6. Step 6: Final answer
    x = 17,916.42

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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.