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Finding the Fourth Proportional to 13,728.48, 20,600.28 and 7,488.24

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Solution

The fourth proportional to 13,728.48, 20,600.28 and 7,488.24 is: 11,236.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.48 : 20,600.28 = 7,488.24 : x
  2. Step 2: Convert to fraction form
    13,728.48/20,600.28 = 7,488.24/x
  3. Step 3: Cross multiply
    13,728.48x = 20,600.28 × 7,488.24
  4. Step 4: Simplify right side
    13,728.48x = 154,259,840.71
  5. Step 5: Solve for x
    x = 154,259,840.71/13,728.48
  6. Step 6: Final answer
    x = 11,236.48

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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.