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Finding the Fourth Proportional to 55,317.60, 82,976.40 and 20,260.80

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Solution

The fourth proportional to 55,317.60, 82,976.40 and 20,260.80 is: 30,391.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,317.60 : 82,976.40 = 20,260.80 : x
  2. Step 2: Convert to fraction form
    55,317.60/82,976.40 = 20,260.80/x
  3. Step 3: Cross multiply
    55,317.60x = 82,976.40 × 20,260.80
  4. Step 4: Simplify right side
    55,317.60x = 1,681,168,245.12
  5. Step 5: Solve for x
    x = 1,681,168,245.12/55,317.60
  6. Step 6: Final answer
    x = 30,391.20

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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.