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Finding the Fourth Proportional to 21,659.90, 32,490.99 and 6,078.74

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Solution

The fourth proportional to 21,659.90, 32,490.99 and 6,078.74 is: 9,118.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,659.90 : 32,490.99 = 6,078.74 : x
  2. Step 2: Convert to fraction form
    21,659.90/32,490.99 = 6,078.74/x
  3. Step 3: Cross multiply
    21,659.90x = 32,490.99 × 6,078.74
  4. Step 4: Simplify right side
    21,659.90x = 197,504,280.55
  5. Step 5: Solve for x
    x = 197,504,280.55/21,659.90
  6. Step 6: Final answer
    x = 9,118.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.