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Finding the Fourth Proportional to 18,779.28, 25,913.44 and 11,224.12

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Solution

The fourth proportional to 18,779.28, 25,913.44 and 11,224.12 is: 15,488.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.28 : 25,913.44 = 11,224.12 : x
  2. Step 2: Convert to fraction form
    18,779.28/25,913.44 = 11,224.12/x
  3. Step 3: Cross multiply
    18,779.28x = 25,913.44 × 11,224.12
  4. Step 4: Simplify right side
    18,779.28x = 290,855,560.17
  5. Step 5: Solve for x
    x = 290,855,560.17/18,779.28
  6. Step 6: Final answer
    x = 15,488.11

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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.