Home / 28,102.91-42,175.14-13,311.85

Finding the Fourth Proportional to 28,102.91, 42,175.14 and 13,311.85

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Solution

The fourth proportional to 28,102.91, 42,175.14 and 13,311.85 is: 19,977.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,102.91 : 42,175.14 = 13,311.85 : x
  2. Step 2: Convert to fraction form
    28,102.91/42,175.14 = 13,311.85/x
  3. Step 3: Cross multiply
    28,102.91x = 42,175.14 × 13,311.85
  4. Step 4: Simplify right side
    28,102.91x = 561,429,137.41
  5. Step 5: Solve for x
    x = 561,429,137.41/28,102.91
  6. Step 6: Final answer
    x = 19,977.62

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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.