Home / 18,870.57-28,379.77-15,918.12

Finding the Fourth Proportional to 18,870.57, 28,379.77 and 15,918.12

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Solution

The fourth proportional to 18,870.57, 28,379.77 and 15,918.12 is: 23,939.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,870.57 : 28,379.77 = 15,918.12 : x
  2. Step 2: Convert to fraction form
    18,870.57/28,379.77 = 15,918.12/x
  3. Step 3: Cross multiply
    18,870.57x = 28,379.77 × 15,918.12
  4. Step 4: Simplify right side
    18,870.57x = 451,752,544.64
  5. Step 5: Solve for x
    x = 451,752,544.64/18,870.57
  6. Step 6: Final answer
    x = 23,939.53

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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.