Home / 7,327.89-10,991.73-1,781.21

Finding the Fourth Proportional to 7,327.89, 10,991.73 and 1,781.21

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Solution

The fourth proportional to 7,327.89, 10,991.73 and 1,781.21 is: 2,671.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,327.89 : 10,991.73 = 1,781.21 : x
  2. Step 2: Convert to fraction form
    7,327.89/10,991.73 = 1,781.21/x
  3. Step 3: Cross multiply
    7,327.89x = 10,991.73 × 1,781.21
  4. Step 4: Simplify right side
    7,327.89x = 19,578,632.49
  5. Step 5: Solve for x
    x = 19,578,632.49/7,327.89
  6. Step 6: Final answer
    x = 2,671.80

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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.