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Finding the Fourth Proportional to 13,318.24, 18,376.32 and 7,726.24

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Solution

The fourth proportional to 13,318.24, 18,376.32 and 7,726.24 is: 10,660.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.24 : 18,376.32 = 7,726.24 : x
  2. Step 2: Convert to fraction form
    13,318.24/18,376.32 = 7,726.24/x
  3. Step 3: Cross multiply
    13,318.24x = 18,376.32 × 7,726.24
  4. Step 4: Simplify right side
    13,318.24x = 141,979,858.64
  5. Step 5: Solve for x
    x = 141,979,858.64/13,318.24
  6. Step 6: Final answer
    x = 10,660.56

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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.