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Finding the Fourth Proportional to 20,295.48, 30,447.90 and 8,609.16

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Solution

The fourth proportional to 20,295.48, 30,447.90 and 8,609.16 is: 12,915.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295.48 : 30,447.90 = 8,609.16 : x
  2. Step 2: Convert to fraction form
    20,295.48/30,447.90 = 8,609.16/x
  3. Step 3: Cross multiply
    20,295.48x = 30,447.90 × 8,609.16
  4. Step 4: Simplify right side
    20,295.48x = 262,130,842.76
  5. Step 5: Solve for x
    x = 262,130,842.76/20,295.48
  6. Step 6: Final answer
    x = 12,915.73

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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.