Home / 19,191.51-28,765.38-8,781.39

Finding the Fourth Proportional to 19,191.51, 28,765.38 and 8,781.39

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Solution

The fourth proportional to 19,191.51, 28,765.38 and 8,781.39 is: 13,162.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,191.51 : 28,765.38 = 8,781.39 : x
  2. Step 2: Convert to fraction form
    19,191.51/28,765.38 = 8,781.39/x
  3. Step 3: Cross multiply
    19,191.51x = 28,765.38 × 8,781.39
  4. Step 4: Simplify right side
    19,191.51x = 252,600,020.28
  5. Step 5: Solve for x
    x = 252,600,020.28/19,191.51
  6. Step 6: Final answer
    x = 13,162.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.