Home / 19,175.85-28,758.09-8,639.79

Finding the Fourth Proportional to 19,175.85, 28,758.09 and 8,639.79

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Solution

The fourth proportional to 19,175.85, 28,758.09 and 8,639.79 is: 12,957.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,175.85 : 28,758.09 = 8,639.79 : x
  2. Step 2: Convert to fraction form
    19,175.85/28,758.09 = 8,639.79/x
  3. Step 3: Cross multiply
    19,175.85x = 28,758.09 × 8,639.79
  4. Step 4: Simplify right side
    19,175.85x = 248,463,858.40
  5. Step 5: Solve for x
    x = 248,463,858.40/19,175.85
  6. Step 6: Final answer
    x = 12,957.12

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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.