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Finding the Fourth Proportional to 18,770.40, 25,905.60 and 10,812.96

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Solution

The fourth proportional to 18,770.40, 25,905.60 and 10,812.96 is: 14,923.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,770.40 : 25,905.60 = 10,812.96 : x
  2. Step 2: Convert to fraction form
    18,770.40/25,905.60 = 10,812.96/x
  3. Step 3: Cross multiply
    18,770.40x = 25,905.60 × 10,812.96
  4. Step 4: Simplify right side
    18,770.40x = 280,116,216.58
  5. Step 5: Solve for x
    x = 280,116,216.58/18,770.40
  6. Step 6: Final answer
    x = 14,923.30

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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.