Home / 13,650.39-18,830.18-9,120.87

Finding the Fourth Proportional to 13,650.39, 18,830.18 and 9,120.87

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Solution

The fourth proportional to 13,650.39, 18,830.18 and 9,120.87 is: 12,581.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,650.39 : 18,830.18 = 9,120.87 : x
  2. Step 2: Convert to fraction form
    13,650.39/18,830.18 = 9,120.87/x
  3. Step 3: Cross multiply
    13,650.39x = 18,830.18 × 9,120.87
  4. Step 4: Simplify right side
    13,650.39x = 171,747,578.25
  5. Step 5: Solve for x
    x = 171,747,578.25/13,650.39
  6. Step 6: Final answer
    x = 12,581.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.