Home / 21,810.25-30,098.55-12,379.42

Finding the Fourth Proportional to 21,810.25, 30,098.55 and 12,379.42

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Solution

The fourth proportional to 21,810.25, 30,098.55 and 12,379.42 is: 17,083.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,810.25 : 30,098.55 = 12,379.42 : x
  2. Step 2: Convert to fraction form
    21,810.25/30,098.55 = 12,379.42/x
  3. Step 3: Cross multiply
    21,810.25x = 30,098.55 × 12,379.42
  4. Step 4: Simplify right side
    21,810.25x = 372,602,591.84
  5. Step 5: Solve for x
    x = 372,602,591.84/21,810.25
  6. Step 6: Final answer
    x = 17,083.83

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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.