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Finding the Fourth Proportional to 53,939.60, 80,909.40 and 18,882.80

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Solution

The fourth proportional to 53,939.60, 80,909.40 and 18,882.80 is: 28,324.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,939.60 : 80,909.40 = 18,882.80 : x
  2. Step 2: Convert to fraction form
    53,939.60/80,909.40 = 18,882.80/x
  3. Step 3: Cross multiply
    53,939.60x = 80,909.40 × 18,882.80
  4. Step 4: Simplify right side
    53,939.60x = 1,527,796,018.32
  5. Step 5: Solve for x
    x = 1,527,796,018.32/53,939.60
  6. Step 6: Final answer
    x = 28,324.20

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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.