Home / 28,379.94-39,123.41-19,855.65

Finding the Fourth Proportional to 28,379.94, 39,123.41 and 19,855.65

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Solution

The fourth proportional to 28,379.94, 39,123.41 and 19,855.65 is: 27,372.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.94 : 39,123.41 = 19,855.65 : x
  2. Step 2: Convert to fraction form
    28,379.94/39,123.41 = 19,855.65/x
  3. Step 3: Cross multiply
    28,379.94x = 39,123.41 × 19,855.65
  4. Step 4: Simplify right side
    28,379.94x = 776,820,636.49
  5. Step 5: Solve for x
    x = 776,820,636.49/28,379.94
  6. Step 6: Final answer
    x = 27,372.17

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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.