Home / 18,631.60-27,947.39-4,780.60

Finding the Fourth Proportional to 18,631.60, 27,947.39 and 4,780.60

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Solution

The fourth proportional to 18,631.60, 27,947.39 and 4,780.60 is: 7,170.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,631.60 : 27,947.39 = 4,780.60 : x
  2. Step 2: Convert to fraction form
    18,631.60/27,947.39 = 4,780.60/x
  3. Step 3: Cross multiply
    18,631.60x = 27,947.39 × 4,780.60
  4. Step 4: Simplify right side
    18,631.60x = 133,605,292.63
  5. Step 5: Solve for x
    x = 133,605,292.63/18,631.60
  6. Step 6: Final answer
    x = 7,170.90

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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.