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Finding the Fourth Proportional to 18,738.48, 28,121.60 and 8,877.80

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Solution

The fourth proportional to 18,738.48, 28,121.60 and 8,877.80 is: 13,323.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,738.48 : 28,121.60 = 8,877.80 : x
  2. Step 2: Convert to fraction form
    18,738.48/28,121.60 = 8,877.80/x
  3. Step 3: Cross multiply
    18,738.48x = 28,121.60 × 8,877.80
  4. Step 4: Simplify right side
    18,738.48x = 249,657,940.48
  5. Step 5: Solve for x
    x = 249,657,940.48/18,738.48
  6. Step 6: Final answer
    x = 13,323.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.