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Finding the Fourth Proportional to 53,976.60, 80,940.60 and 20,685.60

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Solution

The fourth proportional to 53,976.60, 80,940.60 and 20,685.60 is: 31,019.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,976.60 : 80,940.60 = 20,685.60 : x
  2. Step 2: Convert to fraction form
    53,976.60/80,940.60 = 20,685.60/x
  3. Step 3: Cross multiply
    53,976.60x = 80,940.60 × 20,685.60
  4. Step 4: Simplify right side
    53,976.60x = 1,674,304,875.36
  5. Step 5: Solve for x
    x = 1,674,304,875.36/53,976.60
  6. Step 6: Final answer
    x = 31,019.09

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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.