Home / 13,626.87-18,811.47-9,153.78

Finding the Fourth Proportional to 13,626.87, 18,811.47 and 9,153.78

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Solution

The fourth proportional to 13,626.87, 18,811.47 and 9,153.78 is: 12,636.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,626.87 : 18,811.47 = 9,153.78 : x
  2. Step 2: Convert to fraction form
    13,626.87/18,811.47 = 9,153.78/x
  3. Step 3: Cross multiply
    13,626.87x = 18,811.47 × 9,153.78
  4. Step 4: Simplify right side
    13,626.87x = 172,196,057.86
  5. Step 5: Solve for x
    x = 172,196,057.86/13,626.87
  6. Step 6: Final answer
    x = 12,636.51

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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.