Home / 20,877.69-28,738.62-18,220.53

Finding the Fourth Proportional to 20,877.69, 28,738.62 and 18,220.53

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Solution

The fourth proportional to 20,877.69, 28,738.62 and 18,220.53 is: 25,080.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.69 : 28,738.62 = 18,220.53 : x
  2. Step 2: Convert to fraction form
    20,877.69/28,738.62 = 18,220.53/x
  3. Step 3: Cross multiply
    20,877.69x = 28,738.62 × 18,220.53
  4. Step 4: Simplify right side
    20,877.69x = 523,632,887.87
  5. Step 5: Solve for x
    x = 523,632,887.87/20,877.69
  6. Step 6: Final answer
    x = 25,080.98

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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.