Home / 21,398.99-29,530.78-11,838.72

Finding the Fourth Proportional to 21,398.99, 29,530.78 and 11,838.72

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Solution

The fourth proportional to 21,398.99, 29,530.78 and 11,838.72 is: 16,337.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,398.99 : 29,530.78 = 11,838.72 : x
  2. Step 2: Convert to fraction form
    21,398.99/29,530.78 = 11,838.72/x
  3. Step 3: Cross multiply
    21,398.99x = 29,530.78 × 11,838.72
  4. Step 4: Simplify right side
    21,398.99x = 349,606,716.95
  5. Step 5: Solve for x
    x = 349,606,716.95/21,398.99
  6. Step 6: Final answer
    x = 16,337.54

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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.