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Finding the Fourth Proportional to 13,510.57, 20,250.47 and 8,447.09

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Solution

The fourth proportional to 13,510.57, 20,250.47 and 8,447.09 is: 12,661.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,510.57 : 20,250.47 = 8,447.09 : x
  2. Step 2: Convert to fraction form
    13,510.57/20,250.47 = 8,447.09/x
  3. Step 3: Cross multiply
    13,510.57x = 20,250.47 × 8,447.09
  4. Step 4: Simplify right side
    13,510.57x = 171,057,542.63
  5. Step 5: Solve for x
    x = 171,057,542.63/13,510.57
  6. Step 6: Final answer
    x = 12,661.02

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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.