Home / 13,639.05-18,821.55-8,923.23

Finding the Fourth Proportional to 13,639.05, 18,821.55 and 8,923.23

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Solution

The fourth proportional to 13,639.05, 18,821.55 and 8,923.23 is: 12,313.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.05 : 18,821.55 = 8,923.23 : x
  2. Step 2: Convert to fraction form
    13,639.05/18,821.55 = 8,923.23/x
  3. Step 3: Cross multiply
    13,639.05x = 18,821.55 × 8,923.23
  4. Step 4: Simplify right side
    13,639.05x = 167,949,019.61
  5. Step 5: Solve for x
    x = 167,949,019.61/13,639.05
  6. Step 6: Final answer
    x = 12,313.84

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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.