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Finding the Fourth Proportional to 18,485.20, 27,706.20 and 9,715.60

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Solution

The fourth proportional to 18,485.20, 27,706.20 and 9,715.60 is: 14,562.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,485.20 : 27,706.20 = 9,715.60 : x
  2. Step 2: Convert to fraction form
    18,485.20/27,706.20 = 9,715.60/x
  3. Step 3: Cross multiply
    18,485.20x = 27,706.20 × 9,715.60
  4. Step 4: Simplify right side
    18,485.20x = 269,182,356.72
  5. Step 5: Solve for x
    x = 269,182,356.72/18,485.20
  6. Step 6: Final answer
    x = 14,562.05

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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.