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Finding the Fourth Proportional to 18,779.20, 25,914.96 and 10,281.12

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Solution

The fourth proportional to 18,779.20, 25,914.96 and 10,281.12 is: 14,187.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.20 : 25,914.96 = 10,281.12 : x
  2. Step 2: Convert to fraction form
    18,779.20/25,914.96 = 10,281.12/x
  3. Step 3: Cross multiply
    18,779.20x = 25,914.96 × 10,281.12
  4. Step 4: Simplify right side
    18,779.20x = 266,434,813.56
  5. Step 5: Solve for x
    x = 266,434,813.56/18,779.20
  6. Step 6: Final answer
    x = 14,187.76

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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.