Home / 21,351.36-29,462.13-11,920.32

Finding the Fourth Proportional to 21,351.36, 29,462.13 and 11,920.32

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Solution

The fourth proportional to 21,351.36, 29,462.13 and 11,920.32 is: 16,448.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,351.36 : 29,462.13 = 11,920.32 : x
  2. Step 2: Convert to fraction form
    21,351.36/29,462.13 = 11,920.32/x
  3. Step 3: Cross multiply
    21,351.36x = 29,462.13 × 11,920.32
  4. Step 4: Simplify right side
    21,351.36x = 351,198,017.48
  5. Step 5: Solve for x
    x = 351,198,017.48/21,351.36
  6. Step 6: Final answer
    x = 16,448.51

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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.