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Finding the Fourth Proportional to 36,021.50, 49,715.43 and 21,117.50

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Solution

The fourth proportional to 36,021.50, 49,715.43 and 21,117.50 is: 29,145.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,021.50 : 49,715.43 = 21,117.50 : x
  2. Step 2: Convert to fraction form
    36,021.50/49,715.43 = 21,117.50/x
  3. Step 3: Cross multiply
    36,021.50x = 49,715.43 × 21,117.50
  4. Step 4: Simplify right side
    36,021.50x = 1,049,865,593.03
  5. Step 5: Solve for x
    x = 1,049,865,593.03/36,021.50
  6. Step 6: Final answer
    x = 29,145.53

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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.