Home / 13,381.92-18,469.36-7,715.64

Finding the Fourth Proportional to 13,381.92, 18,469.36 and 7,715.64

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Solution

The fourth proportional to 13,381.92, 18,469.36 and 7,715.64 is: 10,648.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.92 : 18,469.36 = 7,715.64 : x
  2. Step 2: Convert to fraction form
    13,381.92/18,469.36 = 7,715.64/x
  3. Step 3: Cross multiply
    13,381.92x = 18,469.36 × 7,715.64
  4. Step 4: Simplify right side
    13,381.92x = 142,502,932.79
  5. Step 5: Solve for x
    x = 142,502,932.79/13,381.92
  6. Step 6: Final answer
    x = 10,648.92

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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.