Home / 18,617.28-25,688.88-11,908.80

Finding the Fourth Proportional to 18,617.28, 25,688.88 and 11,908.80

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Solution

The fourth proportional to 18,617.28, 25,688.88 and 11,908.80 is: 16,432.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,617.28 : 25,688.88 = 11,908.80 : x
  2. Step 2: Convert to fraction form
    18,617.28/25,688.88 = 11,908.80/x
  3. Step 3: Cross multiply
    18,617.28x = 25,688.88 × 11,908.80
  4. Step 4: Simplify right side
    18,617.28x = 305,923,734.14
  5. Step 5: Solve for x
    x = 305,923,734.14/18,617.28
  6. Step 6: Final answer
    x = 16,432.25

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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.