Home / 21,113.48-29,137.92-12,162.26

Finding the Fourth Proportional to 21,113.48, 29,137.92 and 12,162.26

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Solution

The fourth proportional to 21,113.48, 29,137.92 and 12,162.26 is: 16,784.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.48 : 29,137.92 = 12,162.26 : x
  2. Step 2: Convert to fraction form
    21,113.48/29,137.92 = 12,162.26/x
  3. Step 3: Cross multiply
    21,113.48x = 29,137.92 × 12,162.26
  4. Step 4: Simplify right side
    21,113.48x = 354,382,958.90
  5. Step 5: Solve for x
    x = 354,382,958.90/21,113.48
  6. Step 6: Final answer
    x = 16,784.68

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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.