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Finding the Fourth Proportional to 15,000.48, 20,701.86 and 8,629.11

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Solution

The fourth proportional to 15,000.48, 20,701.86 and 8,629.11 is: 11,908.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,000.48 : 20,701.86 = 8,629.11 : x
  2. Step 2: Convert to fraction form
    15,000.48/20,701.86 = 8,629.11/x
  3. Step 3: Cross multiply
    15,000.48x = 20,701.86 × 8,629.11
  4. Step 4: Simplify right side
    15,000.48x = 178,638,627.14
  5. Step 5: Solve for x
    x = 178,638,627.14/15,000.48
  6. Step 6: Final answer
    x = 11,908.86

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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.