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Finding the Fourth Proportional to 20,659.25, 30,971.60 and 9,573.90

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Solution

The fourth proportional to 20,659.25, 30,971.60 and 9,573.90 is: 14,352.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.25 : 30,971.60 = 9,573.90 : x
  2. Step 2: Convert to fraction form
    20,659.25/30,971.60 = 9,573.90/x
  3. Step 3: Cross multiply
    20,659.25x = 30,971.60 × 9,573.90
  4. Step 4: Simplify right side
    20,659.25x = 296,518,873.13
  5. Step 5: Solve for x
    x = 296,518,873.13/20,659.25
  6. Step 6: Final answer
    x = 14,352.84

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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.