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Finding the Fourth Proportional to 25,374.98, 34,983.92 and 20,820.98

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Solution

The fourth proportional to 25,374.98, 34,983.92 and 20,820.98 is: 28,705.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,374.98 : 34,983.92 = 20,820.98 : x
  2. Step 2: Convert to fraction form
    25,374.98/34,983.92 = 20,820.98/x
  3. Step 3: Cross multiply
    25,374.98x = 34,983.92 × 20,820.98
  4. Step 4: Simplify right side
    25,374.98x = 728,399,498.64
  5. Step 5: Solve for x
    x = 728,399,498.64/25,374.98
  6. Step 6: Final answer
    x = 28,705.42

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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.