Home / 11,315.78-16,965.84-4,987.57

Finding the Fourth Proportional to 11,315.78, 16,965.84 and 4,987.57

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Solution

The fourth proportional to 11,315.78, 16,965.84 and 4,987.57 is: 7,477.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,315.78 : 16,965.84 = 4,987.57 : x
  2. Step 2: Convert to fraction form
    11,315.78/16,965.84 = 4,987.57/x
  3. Step 3: Cross multiply
    11,315.78x = 16,965.84 × 4,987.57
  4. Step 4: Simplify right side
    11,315.78x = 84,618,229.78
  5. Step 5: Solve for x
    x = 84,618,229.78/11,315.78
  6. Step 6: Final answer
    x = 7,477.90

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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.