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Finding the Fourth Proportional to 15,201.55, 20,977.99 and 8,487.46

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Solution

The fourth proportional to 15,201.55, 20,977.99 and 8,487.46 is: 11,712.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,201.55 : 20,977.99 = 8,487.46 : x
  2. Step 2: Convert to fraction form
    15,201.55/20,977.99 = 8,487.46/x
  3. Step 3: Cross multiply
    15,201.55x = 20,977.99 × 8,487.46
  4. Step 4: Simplify right side
    15,201.55x = 178,049,851.01
  5. Step 5: Solve for x
    x = 178,049,851.01/15,201.55
  6. Step 6: Final answer
    x = 11,712.61

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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.