Home / 7,720.88-11,581.32-1,877.45

Finding the Fourth Proportional to 7,720.88, 11,581.32 and 1,877.45

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Solution

The fourth proportional to 7,720.88, 11,581.32 and 1,877.45 is: 2,816.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.88 : 11,581.32 = 1,877.45 : x
  2. Step 2: Convert to fraction form
    7,720.88/11,581.32 = 1,877.45/x
  3. Step 3: Cross multiply
    7,720.88x = 11,581.32 × 1,877.45
  4. Step 4: Simplify right side
    7,720.88x = 21,743,291.33
  5. Step 5: Solve for x
    x = 21,743,291.33/7,720.88
  6. Step 6: Final answer
    x = 2,816.17

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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.