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Finding the Fourth Proportional to 14,485.20, 21,727.80 and 14,290.80

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Solution

The fourth proportional to 14,485.20, 21,727.80 and 14,290.80 is: 21,436.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,485.20 : 21,727.80 = 14,290.80 : x
  2. Step 2: Convert to fraction form
    14,485.20/21,727.80 = 14,290.80/x
  3. Step 3: Cross multiply
    14,485.20x = 21,727.80 × 14,290.80
  4. Step 4: Simplify right side
    14,485.20x = 310,507,644.24
  5. Step 5: Solve for x
    x = 310,507,644.24/14,485.20
  6. Step 6: Final answer
    x = 21,436.20

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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.