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Finding the Fourth Proportional to 18,779.79, 25,919.01 and 10,713.48

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Solution

The fourth proportional to 18,779.79, 25,919.01 and 10,713.48 is: 14,786.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.79 : 25,919.01 = 10,713.48 : x
  2. Step 2: Convert to fraction form
    18,779.79/25,919.01 = 10,713.48/x
  3. Step 3: Cross multiply
    18,779.79x = 25,919.01 × 10,713.48
  4. Step 4: Simplify right side
    18,779.79x = 277,682,795.25
  5. Step 5: Solve for x
    x = 277,682,795.25/18,779.79
  6. Step 6: Final answer
    x = 14,786.26

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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.