Home / 36,109.78-49,811.48-21,000.80

Finding the Fourth Proportional to 36,109.78, 49,811.48 and 21,000.80

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Solution

The fourth proportional to 36,109.78, 49,811.48 and 21,000.80 is: 28,969.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,109.78 : 49,811.48 = 21,000.80 : x
  2. Step 2: Convert to fraction form
    36,109.78/49,811.48 = 21,000.80/x
  3. Step 3: Cross multiply
    36,109.78x = 49,811.48 × 21,000.80
  4. Step 4: Simplify right side
    36,109.78x = 1,046,080,929.18
  5. Step 5: Solve for x
    x = 1,046,080,929.18/36,109.78
  6. Step 6: Final answer
    x = 28,969.46

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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.