Home / 36,108.78-49,810.10-20,999.80

Finding the Fourth Proportional to 36,108.78, 49,810.10 and 20,999.80

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Solution

The fourth proportional to 36,108.78, 49,810.10 and 20,999.80 is: 28,968.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,108.78 : 49,810.10 = 20,999.80 : x
  2. Step 2: Convert to fraction form
    36,108.78/49,810.10 = 20,999.80/x
  3. Step 3: Cross multiply
    36,108.78x = 49,810.10 × 20,999.80
  4. Step 4: Simplify right side
    36,108.78x = 1,046,002,137.98
  5. Step 5: Solve for x
    x = 1,046,002,137.98/36,108.78
  6. Step 6: Final answer
    x = 28,968.08

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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.