Home / 18,756.35-28,142.29-8,220.93

Finding the Fourth Proportional to 18,756.35, 28,142.29 and 8,220.93

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Solution

The fourth proportional to 18,756.35, 28,142.29 and 8,220.93 is: 12,334.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756.35 : 28,142.29 = 8,220.93 : x
  2. Step 2: Convert to fraction form
    18,756.35/28,142.29 = 8,220.93/x
  3. Step 3: Cross multiply
    18,756.35x = 28,142.29 × 8,220.93
  4. Step 4: Simplify right side
    18,756.35x = 231,355,614.31
  5. Step 5: Solve for x
    x = 231,355,614.31/18,756.35
  6. Step 6: Final answer
    x = 12,334.79

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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.