Home / 28,135.62-42,206.94-9,429.12

Finding the Fourth Proportional to 28,135.62, 42,206.94 and 9,429.12

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Solution

The fourth proportional to 28,135.62, 42,206.94 and 9,429.12 is: 14,144.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.62 : 42,206.94 = 9,429.12 : x
  2. Step 2: Convert to fraction form
    28,135.62/42,206.94 = 9,429.12/x
  3. Step 3: Cross multiply
    28,135.62x = 42,206.94 × 9,429.12
  4. Step 4: Simplify right side
    28,135.62x = 397,974,302.09
  5. Step 5: Solve for x
    x = 397,974,302.09/28,135.62
  6. Step 6: Final answer
    x = 14,144.86

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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.