Home / 21,379.13-29,511.42-19,137.05

Finding the Fourth Proportional to 21,379.13, 29,511.42 and 19,137.05

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Solution

The fourth proportional to 21,379.13, 29,511.42 and 19,137.05 is: 26,416.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,379.13 : 29,511.42 = 19,137.05 : x
  2. Step 2: Convert to fraction form
    21,379.13/29,511.42 = 19,137.05/x
  3. Step 3: Cross multiply
    21,379.13x = 29,511.42 × 19,137.05
  4. Step 4: Simplify right side
    21,379.13x = 564,761,372.55
  5. Step 5: Solve for x
    x = 564,761,372.55/21,379.13
  6. Step 6: Final answer
    x = 26,416.49

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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.