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Finding the Fourth Proportional to 13,655.52, 18,840.24 and 8,065.44

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Solution

The fourth proportional to 13,655.52, 18,840.24 and 8,065.44 is: 11,127.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,655.52 : 18,840.24 = 8,065.44 : x
  2. Step 2: Convert to fraction form
    13,655.52/18,840.24 = 8,065.44/x
  3. Step 3: Cross multiply
    13,655.52x = 18,840.24 × 8,065.44
  4. Step 4: Simplify right side
    13,655.52x = 151,954,825.31
  5. Step 5: Solve for x
    x = 151,954,825.31/13,655.52
  6. Step 6: Final answer
    x = 11,127.72

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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.