Home / 7,112.88-10,669.05-1,918.89

Finding the Fourth Proportional to 7,112.88, 10,669.05 and 1,918.89

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Solution

The fourth proportional to 7,112.88, 10,669.05 and 1,918.89 is: 2,878.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.88 : 10,669.05 = 1,918.89 : x
  2. Step 2: Convert to fraction form
    7,112.88/10,669.05 = 1,918.89/x
  3. Step 3: Cross multiply
    7,112.88x = 10,669.05 × 1,918.89
  4. Step 4: Simplify right side
    7,112.88x = 20,472,733.35
  5. Step 5: Solve for x
    x = 20,472,733.35/7,112.88
  6. Step 6: Final answer
    x = 2,878.26

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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.