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Finding the Fourth Proportional to 53,977.60, 80,908.80 and 20,684.80

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Solution

The fourth proportional to 53,977.60, 80,908.80 and 20,684.80 is: 31,005.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,977.60 : 80,908.80 = 20,684.80 : x
  2. Step 2: Convert to fraction form
    53,977.60/80,908.80 = 20,684.80/x
  3. Step 3: Cross multiply
    53,977.60x = 80,908.80 × 20,684.80
  4. Step 4: Simplify right side
    53,977.60x = 1,673,582,346.24
  5. Step 5: Solve for x
    x = 1,673,582,346.24/53,977.60
  6. Step 6: Final answer
    x = 31,005.13

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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.