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Finding the Fourth Proportional to 37,987, 52,422.08 and 21,220

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Solution

The fourth proportional to 37,987, 52,422.08 and 21,220 is: 29,283.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,987 : 52,422.08 = 21,220 : x
  2. Step 2: Convert to fraction form
    37,987/52,422.08 = 21,220/x
  3. Step 3: Cross multiply
    37,987x = 52,422.08 × 21,220
  4. Step 4: Simplify right side
    37,987x = 1,112,396,537.60
  5. Step 5: Solve for x
    x = 1,112,396,537.60/37,987
  6. Step 6: Final answer
    x = 29,283.61

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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.