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Finding the Fourth Proportional to 28,218.80, 38,947.02 and 16,280.48

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Solution

The fourth proportional to 28,218.80, 38,947.02 and 16,280.48 is: 22,469.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,218.80 : 38,947.02 = 16,280.48 : x
  2. Step 2: Convert to fraction form
    28,218.80/38,947.02 = 16,280.48/x
  3. Step 3: Cross multiply
    28,218.80x = 38,947.02 × 16,280.48
  4. Step 4: Simplify right side
    28,218.80x = 634,076,180.17
  5. Step 5: Solve for x
    x = 634,076,180.17/28,218.80
  6. Step 6: Final answer
    x = 22,469.99

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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.