Home / 18,812.55-28,218.15-7,716.36

Finding the Fourth Proportional to 18,812.55, 28,218.15 and 7,716.36

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Solution

The fourth proportional to 18,812.55, 28,218.15 and 7,716.36 is: 11,574.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.55 : 28,218.15 = 7,716.36 : x
  2. Step 2: Convert to fraction form
    18,812.55/28,218.15 = 7,716.36/x
  3. Step 3: Cross multiply
    18,812.55x = 28,218.15 × 7,716.36
  4. Step 4: Simplify right side
    18,812.55x = 217,741,403.93
  5. Step 5: Solve for x
    x = 217,741,403.93/18,812.55
  6. Step 6: Final answer
    x = 11,574.26

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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.