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Finding the Fourth Proportional to 8,485.96, 12,728.46 and 3,553

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Solution

The fourth proportional to 8,485.96, 12,728.46 and 3,553 is: 5,329.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.96 : 12,728.46 = 3,553 : x
  2. Step 2: Convert to fraction form
    8,485.96/12,728.46 = 3,553/x
  3. Step 3: Cross multiply
    8,485.96x = 12,728.46 × 3,553
  4. Step 4: Simplify right side
    8,485.96x = 45,224,218.38
  5. Step 5: Solve for x
    x = 45,224,218.38/8,485.96
  6. Step 6: Final answer
    x = 5,329.30

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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.