Home / 13,318.79-18,379.30-7,649.54

Finding the Fourth Proportional to 13,318.79, 18,379.30 and 7,649.54

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Solution

The fourth proportional to 13,318.79, 18,379.30 and 7,649.54 is: 10,556.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.79 : 18,379.30 = 7,649.54 : x
  2. Step 2: Convert to fraction form
    13,318.79/18,379.30 = 7,649.54/x
  3. Step 3: Cross multiply
    13,318.79x = 18,379.30 × 7,649.54
  4. Step 4: Simplify right side
    13,318.79x = 140,593,190.52
  5. Step 5: Solve for x
    x = 140,593,190.52/13,318.79
  6. Step 6: Final answer
    x = 10,556.00

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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.