Home / 21,786.23-29,869.18-21,392.57

Finding the Fourth Proportional to 21,786.23, 29,869.18 and 21,392.57

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Solution

The fourth proportional to 21,786.23, 29,869.18 and 21,392.57 is: 29,329.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,786.23 : 29,869.18 = 21,392.57 : x
  2. Step 2: Convert to fraction form
    21,786.23/29,869.18 = 21,392.57/x
  3. Step 3: Cross multiply
    21,786.23x = 29,869.18 × 21,392.57
  4. Step 4: Simplify right side
    21,786.23x = 638,978,523.99
  5. Step 5: Solve for x
    x = 638,978,523.99/21,786.23
  6. Step 6: Final answer
    x = 29,329.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.