Home / 13,313.79-18,369.74-8,138.36

Finding the Fourth Proportional to 13,313.79, 18,369.74 and 8,138.36

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Solution

The fourth proportional to 13,313.79, 18,369.74 and 8,138.36 is: 11,228.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,313.79 : 18,369.74 = 8,138.36 : x
  2. Step 2: Convert to fraction form
    13,313.79/18,369.74 = 8,138.36/x
  3. Step 3: Cross multiply
    13,313.79x = 18,369.74 × 8,138.36
  4. Step 4: Simplify right side
    13,313.79x = 149,499,623.50
  5. Step 5: Solve for x
    x = 149,499,623.50/13,313.79
  6. Step 6: Final answer
    x = 11,228.93

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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.