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Finding the Fourth Proportional to 13,311, 18,369.18 and 7,723.08

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Solution

The fourth proportional to 13,311, 18,369.18 and 7,723.08 is: 10,657.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,311 : 18,369.18 = 7,723.08 : x
  2. Step 2: Convert to fraction form
    13,311/18,369.18 = 7,723.08/x
  3. Step 3: Cross multiply
    13,311x = 18,369.18 × 7,723.08
  4. Step 4: Simplify right side
    13,311x = 141,866,646.67
  5. Step 5: Solve for x
    x = 141,866,646.67/13,311
  6. Step 6: Final answer
    x = 10,657.85

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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.