Home / 18,381.72-25,366.86-9,998.28

Finding the Fourth Proportional to 18,381.72, 25,366.86 and 9,998.28

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Solution

The fourth proportional to 18,381.72, 25,366.86 and 9,998.28 is: 13,797.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,381.72 : 25,366.86 = 9,998.28 : x
  2. Step 2: Convert to fraction form
    18,381.72/25,366.86 = 9,998.28/x
  3. Step 3: Cross multiply
    18,381.72x = 25,366.86 × 9,998.28
  4. Step 4: Simplify right side
    18,381.72x = 253,624,969.00
  5. Step 5: Solve for x
    x = 253,624,969.00/18,381.72
  6. Step 6: Final answer
    x = 13,797.67

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Half scale
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Double scale
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Similar ratio
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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.