Home / 7,113.78-10,669.86-1,920.06

Finding the Fourth Proportional to 7,113.78, 10,669.86 and 1,920.06

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Solution

The fourth proportional to 7,113.78, 10,669.86 and 1,920.06 is: 2,879.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,113.78 : 10,669.86 = 1,920.06 : x
  2. Step 2: Convert to fraction form
    7,113.78/10,669.86 = 1,920.06/x
  3. Step 3: Cross multiply
    7,113.78x = 10,669.86 × 1,920.06
  4. Step 4: Simplify right side
    7,113.78x = 20,486,771.39
  5. Step 5: Solve for x
    x = 20,486,771.39/7,113.78
  6. Step 6: Final answer
    x = 2,879.87

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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.