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Finding the Fourth Proportional to 53,906.80, 80,838.60 and 18,828.40

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Solution

The fourth proportional to 53,906.80, 80,838.60 and 18,828.40 is: 28,235.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,906.80 : 80,838.60 = 18,828.40 : x
  2. Step 2: Convert to fraction form
    53,906.80/80,838.60 = 18,828.40/x
  3. Step 3: Cross multiply
    53,906.80x = 80,838.60 × 18,828.40
  4. Step 4: Simplify right side
    53,906.80x = 1,522,061,496.24
  5. Step 5: Solve for x
    x = 1,522,061,496.24/53,906.80
  6. Step 6: Final answer
    x = 28,235.06

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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.