Home / 13,729.32-18,945.06-8,424.36

Finding the Fourth Proportional to 13,729.32, 18,945.06 and 8,424.36

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Solution

The fourth proportional to 13,729.32, 18,945.06 and 8,424.36 is: 11,624.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.32 : 18,945.06 = 8,424.36 : x
  2. Step 2: Convert to fraction form
    13,729.32/18,945.06 = 8,424.36/x
  3. Step 3: Cross multiply
    13,729.32x = 18,945.06 × 8,424.36
  4. Step 4: Simplify right side
    13,729.32x = 159,600,005.66
  5. Step 5: Solve for x
    x = 159,600,005.66/13,729.32
  6. Step 6: Final answer
    x = 11,624.76

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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.