Home / 18,971.87-28,458.23-4,932.45

Finding the Fourth Proportional to 18,971.87, 28,458.23 and 4,932.45

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Solution

The fourth proportional to 18,971.87, 28,458.23 and 4,932.45 is: 7,398.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,971.87 : 28,458.23 = 4,932.45 : x
  2. Step 2: Convert to fraction form
    18,971.87/28,458.23 = 4,932.45/x
  3. Step 3: Cross multiply
    18,971.87x = 28,458.23 × 4,932.45
  4. Step 4: Simplify right side
    18,971.87x = 140,368,771.90
  5. Step 5: Solve for x
    x = 140,368,771.90/18,971.87
  6. Step 6: Final answer
    x = 7,398.78

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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.