Home / 12,780.60-17,636.58-7,191.96

Finding the Fourth Proportional to 12,780.60, 17,636.58 and 7,191.96

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Solution

The fourth proportional to 12,780.60, 17,636.58 and 7,191.96 is: 9,924.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.60 : 17,636.58 = 7,191.96 : x
  2. Step 2: Convert to fraction form
    12,780.60/17,636.58 = 7,191.96/x
  3. Step 3: Cross multiply
    12,780.60x = 17,636.58 × 7,191.96
  4. Step 4: Simplify right side
    12,780.60x = 126,841,577.90
  5. Step 5: Solve for x
    x = 126,841,577.90/12,780.60
  6. Step 6: Final answer
    x = 9,924.54

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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.