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Finding the Fourth Proportional to 30,010.88, 41,371.08 and 21,031.22

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Solution

The fourth proportional to 30,010.88, 41,371.08 and 21,031.22 is: 28,992.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,010.88 : 41,371.08 = 21,031.22 : x
  2. Step 2: Convert to fraction form
    30,010.88/41,371.08 = 21,031.22/x
  3. Step 3: Cross multiply
    30,010.88x = 41,371.08 × 21,031.22
  4. Step 4: Simplify right side
    30,010.88x = 870,084,285.12
  5. Step 5: Solve for x
    x = 870,084,285.12/30,010.88
  6. Step 6: Final answer
    x = 28,992.29

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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.