Home / 21,929.94-30,256.11-13,423.19

Finding the Fourth Proportional to 21,929.94, 30,256.11 and 13,423.19

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Solution

The fourth proportional to 21,929.94, 30,256.11 and 13,423.19 is: 18,519.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,929.94 : 30,256.11 = 13,423.19 : x
  2. Step 2: Convert to fraction form
    21,929.94/30,256.11 = 13,423.19/x
  3. Step 3: Cross multiply
    21,929.94x = 30,256.11 × 13,423.19
  4. Step 4: Simplify right side
    21,929.94x = 406,133,361.91
  5. Step 5: Solve for x
    x = 406,133,361.91/21,929.94
  6. Step 6: Final answer
    x = 18,519.58

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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.