Home / 11,815.09-16,307.18-6,782.71

Finding the Fourth Proportional to 11,815.09, 16,307.18 and 6,782.71

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Solution

The fourth proportional to 11,815.09, 16,307.18 and 6,782.71 is: 9,361.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,815.09 : 16,307.18 = 6,782.71 : x
  2. Step 2: Convert to fraction form
    11,815.09/16,307.18 = 6,782.71/x
  3. Step 3: Cross multiply
    11,815.09x = 16,307.18 × 6,782.71
  4. Step 4: Simplify right side
    11,815.09x = 110,606,872.86
  5. Step 5: Solve for x
    x = 110,606,872.86/11,815.09
  6. Step 6: Final answer
    x = 9,361.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.