Home / 21,838.24-30,136.78-11,902.24

Finding the Fourth Proportional to 21,838.24, 30,136.78 and 11,902.24

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Solution

The fourth proportional to 21,838.24, 30,136.78 and 11,902.24 is: 16,425.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,838.24 : 30,136.78 = 11,902.24 : x
  2. Step 2: Convert to fraction form
    21,838.24/30,136.78 = 11,902.24/x
  3. Step 3: Cross multiply
    21,838.24x = 30,136.78 × 11,902.24
  4. Step 4: Simplify right side
    21,838.24x = 358,695,188.39
  5. Step 5: Solve for x
    x = 358,695,188.39/21,838.24
  6. Step 6: Final answer
    x = 16,425.10

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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.