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Finding the Fourth Proportional to 18,361.30, 25,338.75 and 9,977.80

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Solution

The fourth proportional to 18,361.30, 25,338.75 and 9,977.80 is: 13,769.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,361.30 : 25,338.75 = 9,977.80 : x
  2. Step 2: Convert to fraction form
    18,361.30/25,338.75 = 9,977.80/x
  3. Step 3: Cross multiply
    18,361.30x = 25,338.75 × 9,977.80
  4. Step 4: Simplify right side
    18,361.30x = 252,824,853.06
  5. Step 5: Solve for x
    x = 252,824,853.06/18,361.30
  6. Step 6: Final answer
    x = 13,769.45

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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.