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Finding the Fourth Proportional to 18,688.24, 27,993.48 and 8,835.40

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Solution

The fourth proportional to 18,688.24, 27,993.48 and 8,835.40 is: 13,234.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,688.24 : 27,993.48 = 8,835.40 : x
  2. Step 2: Convert to fraction form
    18,688.24/27,993.48 = 8,835.40/x
  3. Step 3: Cross multiply
    18,688.24x = 27,993.48 × 8,835.40
  4. Step 4: Simplify right side
    18,688.24x = 247,333,593.19
  5. Step 5: Solve for x
    x = 247,333,593.19/18,688.24
  6. Step 6: Final answer
    x = 13,234.72

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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.