Home / 21,113.62-29,138.25-11,682.34

Finding the Fourth Proportional to 21,113.62, 29,138.25 and 11,682.34

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Solution

The fourth proportional to 21,113.62, 29,138.25 and 11,682.34 is: 16,122.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.62 : 29,138.25 = 11,682.34 : x
  2. Step 2: Convert to fraction form
    21,113.62/29,138.25 = 11,682.34/x
  3. Step 3: Cross multiply
    21,113.62x = 29,138.25 × 11,682.34
  4. Step 4: Simplify right side
    21,113.62x = 340,402,943.51
  5. Step 5: Solve for x
    x = 340,402,943.51/21,113.62
  6. Step 6: Final answer
    x = 16,122.43

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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.