Home / 38,279.12-52,820.68-21,511.12

Finding the Fourth Proportional to 38,279.12, 52,820.68 and 21,511.12

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Solution

The fourth proportional to 38,279.12, 52,820.68 and 21,511.12 is: 29,682.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,279.12 : 52,820.68 = 21,511.12 : x
  2. Step 2: Convert to fraction form
    38,279.12/52,820.68 = 21,511.12/x
  3. Step 3: Cross multiply
    38,279.12x = 52,820.68 × 21,511.12
  4. Step 4: Simplify right side
    38,279.12x = 1,136,231,985.96
  5. Step 5: Solve for x
    x = 1,136,231,985.96/38,279.12
  6. Step 6: Final answer
    x = 29,682.81

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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.