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Finding the Fourth Proportional to 13,728.98, 18,939.20 and 9,246.98

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Solution

The fourth proportional to 13,728.98, 18,939.20 and 9,246.98 is: 12,756.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.98 : 18,939.20 = 9,246.98 : x
  2. Step 2: Convert to fraction form
    13,728.98/18,939.20 = 9,246.98/x
  3. Step 3: Cross multiply
    13,728.98x = 18,939.20 × 9,246.98
  4. Step 4: Simplify right side
    13,728.98x = 175,130,403.62
  5. Step 5: Solve for x
    x = 175,130,403.62/13,728.98
  6. Step 6: Final answer
    x = 12,756.26

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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.