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Finding the Fourth Proportional to 20,295.32, 30,445.40 and 8,607

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Solution

The fourth proportional to 20,295.32, 30,445.40 and 8,607 is: 12,911.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,295.32 : 30,445.40 = 8,607 : x
  2. Step 2: Convert to fraction form
    20,295.32/30,445.40 = 8,607/x
  3. Step 3: Cross multiply
    20,295.32x = 30,445.40 × 8,607
  4. Step 4: Simplify right side
    20,295.32x = 262,043,557.80
  5. Step 5: Solve for x
    x = 262,043,557.80/20,295.32
  6. Step 6: Final answer
    x = 12,911.53

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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.