Home / 5,119.25-7,678.89-1,561.41

Finding the Fourth Proportional to 5,119.25, 7,678.89 and 1,561.41

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Solution

The fourth proportional to 5,119.25, 7,678.89 and 1,561.41 is: 2,342.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119.25 : 7,678.89 = 1,561.41 : x
  2. Step 2: Convert to fraction form
    5,119.25/7,678.89 = 1,561.41/x
  3. Step 3: Cross multiply
    5,119.25x = 7,678.89 × 1,561.41
  4. Step 4: Simplify right side
    5,119.25x = 11,989,895.63
  5. Step 5: Solve for x
    x = 11,989,895.63/5,119.25
  6. Step 6: Final answer
    x = 2,342.12

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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.