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Finding the Fourth Proportional to 55,319.80, 82,979.70 and 18,383.80

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Solution

The fourth proportional to 55,319.80, 82,979.70 and 18,383.80 is: 27,575.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,319.80 : 82,979.70 = 18,383.80 : x
  2. Step 2: Convert to fraction form
    55,319.80/82,979.70 = 18,383.80/x
  3. Step 3: Cross multiply
    55,319.80x = 82,979.70 × 18,383.80
  4. Step 4: Simplify right side
    55,319.80x = 1,525,482,208.86
  5. Step 5: Solve for x
    x = 1,525,482,208.86/55,319.80
  6. Step 6: Final answer
    x = 27,575.70

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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.